Product Name

  • Name

    3,20-Dioxopregna-1,4,9(11),16-tetraen-21-yl acetate

  • EINECS 253-497-3
  • CAS No. 37413-91-5
  • Article Data15
  • CAS DataBase
  • Density 1.211 g/cm3
  • Solubility
  • Melting Point 173-175°C
  • Formula C23H26O4
  • Boiling Point 534.568 °C at 760 mmHg
  • Molecular Weight 366.457
  • Flash Point 233.008 °C
  • Transport Information
  • Appearance
  • Safety
  • Risk Codes
  • Molecular Structure Molecular Structure of 37413-91-5 (3,20-Dioxopregna-1,4,9(11),16-tetraen-21-yl acetate)
  • Hazard Symbols
  • Synonyms 1,4,9(11),16-Pregnatetraene-21-ol-3,20-Dione-21-Acetate(3TR);Pregna-1,4,9(11),16-tetraene-3,20-dione,21-hydroxy-, acetate (6CI,7CI);21-Acetoxypregna-1,4,9(11),16-tetraene-3,20-dione;Tetraene Acetate;
  • PSA 60.44000
  • LogP 3.88290

Synthetic route

pregna-1,4,9(11)-triene-17α,21-diol-3,20-dione 21-acetate
4380-55-6

pregna-1,4,9(11)-triene-17α,21-diol-3,20-dione 21-acetate

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

Conditions
ConditionsYield
Stage #1: pregna-1,4,9(11)-triene-17α,21-diol-3,20-dione 21-acetate With pyridine; N-chloro-succinimide at -15℃; for 1h; Inert atmosphere;
Stage #2: With sulfur dioxide at -10℃; for 0.5h; Inert atmosphere;		98.8%
prednisolone 21-acetate
52-21-1

prednisolone 21-acetate

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

Conditions
ConditionsYield
Stage #1: prednisolone 21-acetate With pyridine; N-chloro-succinimide at -15 - 20℃; for 0.416667h; Inert atmosphere;
Stage #2: With sulfur dioxide for 1h; Inert atmosphere;		83.5%
prednisolone 21-acetate
52-21-1

prednisolone 21-acetate

A

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

B

pregna-1,4,9(11)-triene-17α,21-diol-3,20-dione 21-acetate
4380-55-6

pregna-1,4,9(11)-triene-17α,21-diol-3,20-dione 21-acetate

C

2-((10S)-10,17-dimethyl-3-oxo-6,7,8,10,12,15,16,17-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

2-((10S)-10,17-dimethyl-3-oxo-6,7,8,10,12,15,16,17-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

D

C46H54O11S

C46H54O11S

Conditions
ConditionsYield
With pyridine; thionyl chloride In N,N-dimethyl-formamide at 20℃; Reagent/catalyst; Temperature;A 50%
B n/a
C n/a
D n/a
...Expand
21-acetoxy-pregna-4,9(11),16-triene-3,20-dinone
23460-76-6

21-acetoxy-pregna-4,9(11),16-triene-3,20-dinone

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

Conditions
ConditionsYield
With selenium(IV) oxide; tert-butyl alcohol
With pyridine; selenium(IV) oxide In tert-butyl alcohol for 24h; Reflux; Inert atmosphere;25.27 g
2,4,6-trimethyl-pyridine
108-75-8

2,4,6-trimethyl-pyridine

21-acetoxy-2α-bromo-pregna-4,9(11),16-triene-3,20-dione

21-acetoxy-2α-bromo-pregna-4,9(11),16-triene-3,20-dione

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

prednisolon
50-24-8

prednisolon

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1.1: thionyl chloride / tetrahydrofuran / 0.67 h / 0 °C / Inert atmosphere
1.2: 1.25 h / 5 - 20 °C
2.1: dmap / dichloromethane / 0.5 h / 20 °C / Inert atmosphere
3.1: 1,8-diazabicyclo[5.4.0]undec-7-ene / tetrahydrofuran / 3 h / 60 °C / Inert atmosphere
View Scheme
C21H24O3

C21H24O3

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: dmap / dichloromethane / 0.5 h / 20 °C / Inert atmosphere
2: 1,8-diazabicyclo[5.4.0]undec-7-ene / tetrahydrofuran / 3 h / 60 °C / Inert atmosphere
View Scheme
18-hydroxypregnane-1,4,9(11),17-tetraene-3,19-dione-18-acetate

18-hydroxypregnane-1,4,9(11),17-tetraene-3,19-dione-18-acetate

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

Conditions
ConditionsYield
With 1,8-diazabicyclo[5.4.0]undec-7-ene In tetrahydrofuran at 60℃; for 3h; Inert atmosphere;1.92 g
With 1,8-diazabicyclo[5.4.0]undec-7-ene at 50℃; for 5h; Inert atmosphere;27.6 g
C23H27BrO4

C23H27BrO4

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

Conditions
ConditionsYield
With potassium acetate; acetic acid In N,N-dimethyl-formamide at 105℃; for 5h; Reagent/catalyst; Solvent; Temperature; Inert atmosphere; Large scale;965 g
androsta-1,4,9(11)-triene-3,17-dione
15375-21-0

androsta-1,4,9(11)-triene-3,17-dione

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1.1: potassium hydroxide / tetrahydrofuran; acetone / 2 h / 0 - 40 °C / Inert atmosphere; Large scale
1.2: 15 h / -5 - 5 °C / Large scale
2.1: dmap; triethylamine / dichloromethane / 7 h / Inert atmosphere; Reflux; Large scale
3.1: N-Bromosuccinimide / acetone; tert-butyl alcohol / 2 h / 10 - 20 °C / Large scale
3.2: 1 h / 30 - 35 °C / Inert atmosphere; Large scale
4.1: potassium acetate; acetic acid / N,N-dimethyl-formamide / 5 h / 105 °C / Inert atmosphere; Large scale
View Scheme
17α-ethynyl-17β-hydroxy-1,4,9(11)-trieneandrostan-3-one

17α-ethynyl-17β-hydroxy-1,4,9(11)-trieneandrostan-3-one

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1.1: dmap; triethylamine / dichloromethane / 7 h / Inert atmosphere; Reflux; Large scale
2.1: N-Bromosuccinimide / acetone; tert-butyl alcohol / 2 h / 10 - 20 °C / Large scale
2.2: 1 h / 30 - 35 °C / Inert atmosphere; Large scale
3.1: potassium acetate; acetic acid / N,N-dimethyl-formamide / 5 h / 105 °C / Inert atmosphere; Large scale
View Scheme
androst-4,9(11)-dien-3,17-dione
1035-69-4

androst-4,9(11)-dien-3,17-dione

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

Conditions
ConditionsYield
Multi-step reaction with 6 steps
1.1: acetone / 0.5 h / 20 °C
2.1: calcium oxide; calcium chloride; iodine / methanol; dichloromethane; water / 1.5 h / 20 °C / Inert atmosphere
3.1: potassium acetate / N,N-dimethyl-formamide / 2 h / 65 °C / Inert atmosphere
3.2: 0.5 h / Inert atmosphere
4.1: toluene-4-sulfonic acid; trifluoroacetic anhydride / dichloromethane / 2.5 h / 20 °C
4.2: 0.25 h
5.1: potassium acetate / dimethyl sulfoxide / 2 h / 80 °C / Inert atmosphere
5.2: 0.5 h / Inert atmosphere
6.1: pyridine; selenium(IV) oxide / tert-butyl alcohol / 24 h / Reflux; Inert atmosphere
View Scheme
9-alpha-hydroxyandrost-4-ene-3,17-dione
560-62-3, 23015-99-8

9-alpha-hydroxyandrost-4-ene-3,17-dione

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

Conditions
ConditionsYield
Multi-step reaction with 6 steps
1.1: diethyl ether / 0.5 h / 20 °C
2.1: calcium oxide; calcium chloride; iodine / methanol; dichloromethane; water / 1.5 h / 20 °C / Inert atmosphere
3.1: potassium acetate / N,N-dimethyl-formamide / 2 h / 65 °C / Inert atmosphere
3.2: 0.5 h / Inert atmosphere
4.1: toluene-4-sulfonic acid; trifluoroacetic anhydride / dichloromethane / 2.5 h / 20 °C
4.2: 0.25 h
5.1: potassium acetate / dimethyl sulfoxide / 2 h / 80 °C / Inert atmosphere
5.2: 0.5 h / Inert atmosphere
6.1: pyridine; selenium(IV) oxide / tert-butyl alcohol / 24 h / Reflux; Inert atmosphere
View Scheme
17α-Hydroxy-21-iodopregna-4,9(11)-diene-3,20-dione
95816-38-9

17α-Hydroxy-21-iodopregna-4,9(11)-diene-3,20-dione

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1.1: potassium acetate / N,N-dimethyl-formamide / 2 h / 65 °C / Inert atmosphere
1.2: 0.5 h / Inert atmosphere
2.1: toluene-4-sulfonic acid; trifluoroacetic anhydride / dichloromethane / 2.5 h / 20 °C
2.2: 0.25 h
3.1: potassium acetate / dimethyl sulfoxide / 2 h / 80 °C / Inert atmosphere
3.2: 0.5 h / Inert atmosphere
4.1: pyridine; selenium(IV) oxide / tert-butyl alcohol / 24 h / Reflux; Inert atmosphere
View Scheme
pregna-4,9(11)-diene-3,20-dione-17-hydroxy-21-methyl
34184-82-2

pregna-4,9(11)-diene-3,20-dione-17-hydroxy-21-methyl

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

Conditions
ConditionsYield
Multi-step reaction with 5 steps
1.1: calcium oxide; calcium chloride; iodine / methanol; dichloromethane; water / 1.5 h / 20 °C / Inert atmosphere
2.1: potassium acetate / N,N-dimethyl-formamide / 2 h / 65 °C / Inert atmosphere
2.2: 0.5 h / Inert atmosphere
3.1: toluene-4-sulfonic acid; trifluoroacetic anhydride / dichloromethane / 2.5 h / 20 °C
3.2: 0.25 h
4.1: potassium acetate / dimethyl sulfoxide / 2 h / 80 °C / Inert atmosphere
4.2: 0.5 h / Inert atmosphere
5.1: pyridine; selenium(IV) oxide / tert-butyl alcohol / 24 h / Reflux; Inert atmosphere
View Scheme
anecortave
7753-60-8

anecortave

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1.1: toluene-4-sulfonic acid; trifluoroacetic anhydride / dichloromethane / 2.5 h / 20 °C
1.2: 0.25 h
2.1: potassium acetate / dimethyl sulfoxide / 2 h / 80 °C / Inert atmosphere
2.2: 0.5 h / Inert atmosphere
3.1: pyridine; selenium(IV) oxide / tert-butyl alcohol / 24 h / Reflux; Inert atmosphere
View Scheme
pregna-4,9(11)-diene-17α,21-diol-3,20-dione 17,21-diacetate
7780-63-4

pregna-4,9(11)-diene-17α,21-diol-3,20-dione 17,21-diacetate

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1.1: potassium acetate / dimethyl sulfoxide / 2 h / 80 °C / Inert atmosphere
1.2: 0.5 h / Inert atmosphere
2.1: pyridine; selenium(IV) oxide / tert-butyl alcohol / 24 h / Reflux; Inert atmosphere
View Scheme
2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

N,N-dimethyl-formamide
68-12-2, 33513-42-7

N,N-dimethyl-formamide

C24H27BrO6

C24H27BrO6

Conditions
ConditionsYield
Stage #1: 2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate; N,N-dimethyl-formamide With perchloric acid In water at 20 - 27℃; Inert atmosphere;
Stage #2: With 1,3-dibromo-5,5-dimethylimidazolidine-2,4-dione In water; N,N-dimethyl-formamide at 20 - 35℃; Inert atmosphere;		99%
2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

16α,17α,21-trihydroxypregna-1,4,9(11)-triene-3,20-dione-21-acetate
77017-20-0

16α,17α,21-trihydroxypregna-1,4,9(11)-triene-3,20-dione-21-acetate

Conditions
ConditionsYield
Stage #1: 2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate With formic acid In acetone at -5 - 0℃; for 0.0833333h;
Stage #2: With potassium permanganate In water; acetone at -5 - 0℃; for 0.166667h;		96%
With potassium permanganate
With potassium permanganate; formic acid In water; acetone at -7 - -3℃; for 0.5h; Industrial scale;15 kg
With potassium permanganate; oxalic acid In water; butanone at -5℃; Reagent/catalyst; Solvent; Temperature;50.5 g
2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

C23H26O5

C23H26O5

Conditions
ConditionsYield
Stage #1: 2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate With perchloric acid; 1,3-dibromo-5,5-dimethylimidazolidine-2,4-dione In water; acetone at -10 - -5℃; for 2h;
Stage #2: With potassium carbonate In water; acetone at -5 - 35℃; for 12h;		96%
Stage #1: 2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate With perchloric acid; 1,3-dibromo-5,5-dimethylimidazolidine-2,4-dione In acetone at -10 - -5℃;
Stage #2: With potassium carbonate In acetone at 33 - 37℃;		83.36%
2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

C23H28O6

C23H28O6

Conditions
ConditionsYield
With potassium permanganate; formic acid In water; acetone at -5 - 0℃; for 0.5h; Solvent; Temperature; Inert atmosphere;86%
(phenylthio)nitromethane
60595-16-6

(phenylthio)nitromethane

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

Acetic acid 2-[(8S,10S,13S,14S,16R,17S)-10,13-dimethyl-16-(nitro-phenylsulfanyl-methyl)-3-oxo-6,7,8,10,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthren-17-yl]-2-oxo-ethyl ester
144602-46-0

Acetic acid 2-[(8S,10S,13S,14S,16R,17S)-10,13-dimethyl-16-(nitro-phenylsulfanyl-methyl)-3-oxo-6,7,8,10,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthren-17-yl]-2-oxo-ethyl ester

Conditions
ConditionsYield
With 1,8-diazabicyclo[5.4.0]undec-7-ene In tetrahydrofuran; tert-butyl alcohol Yield given;
2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

methyl-d3-magnesium iodide
41251-37-0

methyl-d3-magnesium iodide

C24H27(2)H3O4

C24H27(2)H3O4

Conditions
ConditionsYield
With methylmagnesium chloride; copper(II) propionate In tetrahydrofuran at -9 - -7℃; for 0.666667h;
2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

<14C>methyl iodide
22092-83-7

<14C>methyl iodide

C23(14)CH30O4

C23(14)CH30O4

Conditions
ConditionsYield
With methylmagnesium chloride; copper(II) propionate In tetrahydrofuran at -9 - -7℃; for 0.666667h;
2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

17α,21-dihydroxy-16β-methyl-1,4,9(11)-pregnatriene-3,20-dione 21-acetate
910-99-6

17α,21-dihydroxy-16β-methyl-1,4,9(11)-pregnatriene-3,20-dione 21-acetate

Conditions
ConditionsYield
Multi-step reaction with 5 steps
1: DBU / 2-methyl-propan-2-ol; tetrahydrofuran
2: 70 percent / HOAc
3: m-chloroperbenzoic acid
5: 90 percent / Wilkinson catalyst
View Scheme
Multi-step reaction with 5 steps
1: DBU / 2-methyl-propan-2-ol; tetrahydrofuran
2: 70 percent / HOAc
3: 57 percent / m-chloroperbenzoic acid
5: 90 percent / Wilkinson catalyst
View Scheme
2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

Acetic acid 2-((8S,10S,13S,14S,17R)-17-hydroxy-10,13-dimethyl-16-methylene-3-oxo-6,7,8,10,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxo-ethyl ester
19683-24-0

Acetic acid 2-((8S,10S,13S,14S,17R)-17-hydroxy-10,13-dimethyl-16-methylene-3-oxo-6,7,8,10,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxo-ethyl ester

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: DBU / 2-methyl-propan-2-ol; tetrahydrofuran
2: 70 percent / HOAc
3: m-chloroperbenzoic acid
View Scheme
Multi-step reaction with 4 steps
1: DBU / 2-methyl-propan-2-ol; tetrahydrofuran
2: 70 percent / HOAc
3: 57 percent / m-chloroperbenzoic acid
View Scheme
2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

Acetic acid 2-[(8S,10S,13S,14S,16R,17S)-16-(bis-phenylsulfanyl-methyl)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthren-17-yl]-2-oxo-ethyl ester
144602-47-1

Acetic acid 2-[(8S,10S,13S,14S,16R,17S)-16-(bis-phenylsulfanyl-methyl)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthren-17-yl]-2-oxo-ethyl ester

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: DBU / 2-methyl-propan-2-ol; tetrahydrofuran
2: 70 percent / HOAc
View Scheme
2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

Acetic acid 2-[(8S,10S,13S,14S,16R,17S)-16-(benzenesulfinyl-phenylsulfanyl-methyl)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthren-17-yl]-2-oxo-ethyl ester
144602-48-2

Acetic acid 2-[(8S,10S,13S,14S,16R,17S)-16-(benzenesulfinyl-phenylsulfanyl-methyl)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthren-17-yl]-2-oxo-ethyl ester

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: DBU / 2-methyl-propan-2-ol; tetrahydrofuran
2: 70 percent / HOAc
3: m-chloroperbenzoic acid
View Scheme
2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

Acetic acid 2-[(8S,10S,13S,14S,16R,17S)-16-(bis-benzenesulfinyl-methyl)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthren-17-yl]-2-oxo-ethyl ester
144602-43-7

Acetic acid 2-[(8S,10S,13S,14S,16R,17S)-16-(bis-benzenesulfinyl-methyl)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthren-17-yl]-2-oxo-ethyl ester

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: DBU / 2-methyl-propan-2-ol; tetrahydrofuran
2: 70 percent / HOAc
3: 57 percent / m-chloroperbenzoic acid
View Scheme
2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

16α,21-diacetoxy-17-hydroxy-pregna-1,4,9(11)-triene-3,20-dione
95943-95-6

16α,21-diacetoxy-17-hydroxy-pregna-1,4,9(11)-triene-3,20-dione

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: KMnO4
View Scheme
2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

9β,11β-epoxy-21-hydroxypregna-1,4,16-triene-3,20-dione 21-acetate
103466-44-0

9β,11β-epoxy-21-hydroxypregna-1,4,16-triene-3,20-dione 21-acetate

Isopropenyl acetate
108-22-5

Isopropenyl acetate

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

3,21-diacetyloxy-pregna-1,3,5,9(11),16-pentaene-20-one
1058744-83-4

3,21-diacetyloxy-pregna-1,3,5,9(11),16-pentaene-20-one

Conditions
ConditionsYield
toluene-4-sulfonic acid In water at 80℃; for 4h;
2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

6α-fluoro-1,4,9,16-tetraenepregna-3,20-dione-21-acetate
2476-74-6

6α-fluoro-1,4,9,16-tetraenepregna-3,20-dione-21-acetate

Conditions
ConditionsYield
With Selectfluor In acetonitrile at -10 - 25℃; for 5h;
2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

methylmagnesium chloride
676-58-4

methylmagnesium chloride

methyl iodide
74-88-4

methyl iodide

2-oxo-2-((8S,10S,13S,14S,16R,17S)-10,13,16,17-tetramethyl-3-oxo-2,3,6,7,8,10,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl)ethyl acetate
1201591-22-1

2-oxo-2-((8S,10S,13S,14S,16R,17S)-10,13,16,17-tetramethyl-3-oxo-2,3,6,7,8,10,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl)ethyl acetate

Conditions
ConditionsYield
Stage #1: 2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate; methylmagnesium chloride; copper(II) propionate In tetrahydrofuran Cooling with acetone-dry ice;
Stage #2: methyl iodide In tetrahydrofuran
...Expand
2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

methylmagnesium chloride
676-58-4

methylmagnesium chloride

1-(Trimethylsilyl)imidazole
18156-74-6

1-(Trimethylsilyl)imidazole

(Z)-2-((8S,10S,13S,14S,16R)-10,13,16-trimethyl-3-oxo-7,8,12,13,15,16-hexahydro-3H-cyclopenta[a]phenanthren-17(6H,10H,14H)-ylidene)-2-(trimethylsilyloxy)ethyl acetate
1201591-18-5

(Z)-2-((8S,10S,13S,14S,16R)-10,13,16-trimethyl-3-oxo-7,8,12,13,15,16-hexahydro-3H-cyclopenta[a]phenanthren-17(6H,10H,14H)-ylidene)-2-(trimethylsilyloxy)ethyl acetate

Conditions
ConditionsYield
1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone; copper(II) propionate In tetrahydrofuran; dichloromethane at -50 - -30℃; Inert atmosphere;
...Expand
2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

17α,21-dihydroxy-16α-methyl-1,4,9(11)-pregnatriene-3,20-dione 21-acetate
10106-41-9

17α,21-dihydroxy-16α-methyl-1,4,9(11)-pregnatriene-3,20-dione 21-acetate

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone; copper(II) propionate / dichloromethane; tetrahydrofuran / -50 - -30 °C / Inert atmosphere
2: 3-chloro-benzenecarboperoxoic acid / dichloromethane / 0 °C
View Scheme
Multi-step reaction with 2 steps
1.1: dichloromethane; tetrahydrofuran / 3 h / 20 °C / Inert atmosphere
1.2: 3 h / 20 °C / Inert atmosphere
1.3: -50 °C / Inert atmosphere
2.1: acetic acid; peracetic acid / toluene / 0.5 h / -10 °C / Inert atmosphere
View Scheme
2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

(8S,10S,13S,14S,16R,17S)-17-(2-hydroxyacetyl)-10,13,16-trimethyl-6,7,8,10,12,13,14,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-3(2H)-one
111669-38-6

(8S,10S,13S,14S,16R,17S)-17-(2-hydroxyacetyl)-10,13,16-trimethyl-6,7,8,10,12,13,14,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-3(2H)-one

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone; copper(II) propionate / dichloromethane; tetrahydrofuran / -50 - -30 °C / Inert atmosphere
2: hydrogenchloride; water / ethyl acetate
3: triethylsilane / Wilkinson's catalyst / dichloromethane / 40 °C
4: potassium carbonate; water / dichloromethane; methanol / 2 h / 5 °C / Inert atmosphere; Cooling with ice
View Scheme
2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

16α-methyl-21-hydroxypregna-1,4,9(11)-triene-3,20-dione
56016-90-1

16α-methyl-21-hydroxypregna-1,4,9(11)-triene-3,20-dione

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone; copper(II) propionate / dichloromethane; tetrahydrofuran / -50 - -30 °C / Inert atmosphere
2: hydrogenchloride; water / ethyl acetate
3: potassium carbonate; water / dichloromethane; methanol / 2 h / 5 °C / Inert atmosphere; Cooling with ice
View Scheme
2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

2-oxo-2-((8S,10S,13S,14S,16R,17S)-10,13,16-trimethyl-3-oxo-6,7,8,10,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthren-17-yl)ethyl acetate
4258-83-7

2-oxo-2-((8S,10S,13S,14S,16R,17S)-10,13,16-trimethyl-3-oxo-6,7,8,10,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthren-17-yl)ethyl acetate

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone; copper(II) propionate / dichloromethane; tetrahydrofuran / -50 - -30 °C / Inert atmosphere
2: hydrogenchloride; water / ethyl acetate
View Scheme
2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

2-oxo-2-((8S,10S,13S,14S,16R,17S)-10,13,16-trimethyl-3-oxo-2,3,6,7,8,10,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl)ethyl acetate
177180-83-5

2-oxo-2-((8S,10S,13S,14S,16R,17S)-10,13,16-trimethyl-3-oxo-2,3,6,7,8,10,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl)ethyl acetate

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone; copper(II) propionate / dichloromethane; tetrahydrofuran / -50 - -30 °C / Inert atmosphere
2: hydrogenchloride; water / ethyl acetate
3: triethylsilane / Wilkinson's catalyst / dichloromethane / 40 °C
View Scheme
chloro-trimethyl-silane
75-77-4

chloro-trimethyl-silane

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

methylmagnesium chloride
676-58-4

methylmagnesium chloride

C27H38O4Si

C27H38O4Si

Conditions
ConditionsYield
Stage #1: methylmagnesium chloride With copper dichloride In tetrahydrofuran at 3℃; for 0.0166667h; Inert atmosphere;
Stage #2: 2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate In tetrahydrofuran at 3℃; for 0.0333333h; Grignard Reaction; Inert atmosphere;
Stage #3: chloro-trimethyl-silane; methylmagnesium chloride In tetrahydrofuran at 2℃; for 0.2h; Inert atmosphere;
...Expand
2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
37413-91-5

2-((10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate

17α,21-dihydroxy-9β,11β-epoxy-16α-methylpregna-1,4-diene-3,20-dione 21-acetate
2884-51-7

17α,21-dihydroxy-9β,11β-epoxy-16α-methylpregna-1,4-diene-3,20-dione 21-acetate

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1.1: perchloric acid / water / 20 - 27 °C / Inert atmosphere
1.2: 20 - 35 °C / Inert atmosphere
2.1: potassium carbonate / water; acetone / 40 - 46 °C / Inert atmosphere
3.1: copper dichloride / tetrahydrofuran / 0.02 h / 3 °C / Inert atmosphere
3.2: 0.03 h / 3 °C / Inert atmosphere
3.3: 1.75 h / 2.5 °C / Inert atmosphere
4.1: peracetic acid; acetic acid / dichloromethane / 18 h / 4 - 20 °C / Inert atmosphere
View Scheme

3,20-Dioxopregna-1,4,9(11),16-tetraen-21-yl acetate Chemical Properties

Molecule structure of Pregna-1,4,9(11),16-tetraene-3,20-dione,21-(acetyloxy)- (CAS NO.37413-91-5):

Molecular Formula: C23H26O4
Molecular Weight: 366.46 g/mol
Index of Refraction: 1.585
Molar Refractivity: 101.394 cm3
Molar Volume: 302.712 cm3
Surface Tension: 48.058 dyne/cm
Density: 1.211 g/cm3
Flash Point: 233.008 °C
Enthalpy of Vaporization: 81.081 kJ/mol
Boiling Point: 534.568 °C at 760 mmHg
Vapour Pressure: 0 mmHg at 25 °C 
EINECS of Pregna-1,4,9(11),16-tetraene-3,20-dione,21-(acetyloxy)- (CAS NO.37413-91-5): 253-497-3

3,20-Dioxopregna-1,4,9(11),16-tetraen-21-yl acetate Uses

 Pregna-1,4,9(11),16-tetraene-3,20-dione,21-(acetyloxy)- (CAS NO.37413-91-5) is used for dexamethasone, betamethasone, triamcinolone intermediate.

3,20-Dioxopregna-1,4,9(11),16-tetraen-21-yl acetate Specification

 Pregna-1,4,9(11),16-tetraene-3,20-dione,21-(acetyloxy)- (CAS NO.37413-91-5) is also named as 21-Hydroxypregna-1,4,9(11),16-tetraene-3,20-dione 21-acetate ; 3,20-dioxopregna-1,4,9(11),16-tetraen-21-yl acetate ; Pregna-1,4,9(11),16-tetraen-21-ol-3,20-dione 21-acetate ; 21-Acetoxypregna-1,4,9(11),16-tetrene-3,20-dione ; 3,20-Dioxopregna-1,4,9(11),16-tetrene-21-ol acetate . 

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