Product Name

  • Name

    Octadecanedioic acid

  • EINECS
  • CAS No. 871-70-5
  • Article Data36
  • CAS DataBase
  • Density 0.998 g/cm3
  • Solubility 148.5μg/L at 25℃
  • Melting Point 125 °C
  • Formula C18H34O4
  • Boiling Point 480.9 °C at 760 mmHg
  • Molecular Weight 314.466
  • Flash Point 258.8 °C
  • Transport Information
  • Appearance white crystalline powder
  • Safety 26-36/37/39
  • Risk Codes 36/37/38
  • Molecular Structure Molecular Structure of 871-70-5 (Octadecanedioic acid)
  • Hazard Symbols
  • Synonyms 1,16-Dicarboxyhexadecane;1,16-Hexadecanedicarboxylic acid;1,18-Octadecanedioic acid;Emerox 118;
  • PSA 74.60000
  • LogP 5.39720

Synthetic route

9-heptadecenoic acid
10136-52-4

9-heptadecenoic acid

carbon monoxide
201230-82-2

carbon monoxide

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
With sulfuric acid; α,α′-bis(2-pyridyl(tert-butyl)phosphino)-o-xylene; water; palladium(II) acetylacetonate; acetic acid at 20 - 100℃; under 30003 Torr; for 20h; Inert atmosphere; Autoclave;99%
octadeca-7,11-dienedioic acid
1002-25-1

octadeca-7,11-dienedioic acid

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
With palladium on activated charcoal; hydrogen In methanol at 40℃; for 12h; Solvent; Time;99%
C26H42O8
81393-30-8

C26H42O8

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
With hydrogenchloride In water Heating;98%
dimethyl 1,18-octadecanedioate
1472-93-1

dimethyl 1,18-octadecanedioate

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
With methanol; water; sodium hydroxide at 50℃; for 24h; Reagent/catalyst; Temperature;92%
With sodium hydroxide In methanol
With water at 100 - 225℃; under 18617.8 Torr; for 8h; Temperature; Sealed tube; Inert atmosphere;
1,18-octadecanedioic acid monomethyl ester
72849-35-5

1,18-octadecanedioic acid monomethyl ester

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
With water; lithium hydroxide at 20℃; for 24h;81%
(saponification);
eicosa-1,19-diene
14811-95-1

eicosa-1,19-diene

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
With chromium(VI) oxide; acetic acid
1,14-dibromotetradecane
37688-96-3

1,14-dibromotetradecane

sodium diethylmalonate
996-82-7

sodium diethylmalonate

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
Beim Verseifen des Reaktionsprodukts und Erhitzen;
18-hydroxystearic acid
3155-42-8

18-hydroxystearic acid

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
With potassium dichromate; sulfuric acid at 125℃;
dimethyl 1,18-octadecanedioate
1472-93-1

dimethyl 1,18-octadecanedioate

A

octadecanedioic acid
871-70-5

octadecanedioic acid

B

1,18-octadecanedioic acid monomethyl ester
72849-35-5

1,18-octadecanedioic acid monomethyl ester

Conditions
ConditionsYield
With methanol; potassium hydroxide
With methanol; barium dihydroxide at 40 - 50℃;
5,14-dioxo-octadecanedioic acid
872824-69-6

5,14-dioxo-octadecanedioic acid

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
With sodium; hydrazine hydrate; ethylene glycol
With hydrogenchloride; amalgamated zinc; acetic acid
With sodium hydroxide; hydrazine hydrate; diethylene glycol
6,13-dioxo-octadecanedioic acid
109094-90-8

6,13-dioxo-octadecanedioic acid

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
With potassium hydroxide; hydrazine hydrate; diethylene glycol at 200℃;
cyclooctadecanone
6907-37-5

cyclooctadecanone

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
With chromium(VI) oxide; acetic acid
nonanoic acid
112-05-0

nonanoic acid

octadecanedioic acid
871-70-5

octadecanedioic acid

1,16-dicyanododecane
7735-45-7

1,16-dicyanododecane

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
With sulfuric acid; acetic anhydride In water Heating;
octadec-7-ynedioic acid
102175-43-9

octadec-7-ynedioic acid

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
With hydrogen; nickel
With hydrogen; platinum
Dihydroardisiaquinone A
21551-67-7

Dihydroardisiaquinone A

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
With potassium hydroxide; dihydrogen peroxide
β-Propiolactone
57-57-8

β-Propiolactone

1,12-bis(bromomagnesio)dodecane

1,12-bis(bromomagnesio)dodecane

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
With dilithium tetrachlorocuprate In tetrahydrofuran at 0℃; for 3h;
C18H28O6(2-)*2Na(1+)

C18H28O6(2-)*2Na(1+)

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
With potassium hydroxide; hydrazine hydrate 1.) triethanolamine, 130 deg C; reflux, 4 h; 2.) triethanolamine, 200 deg C, 9 h; Multistep reaction;
4-oxo-hexadecane-dicarboxylic acid-(1.16)

4-oxo-hexadecane-dicarboxylic acid-(1.16)

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
With hydrogenchloride; amalgamated zinc
potassium salt of sebacic acid monoethyl ester

potassium salt of sebacic acid monoethyl ester

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
With water at 50℃; Electrolysis.und Verseifen des entstehenden Diaethylesters durch siedende, ueberschuessige alkoholische Kalilauge;
Adipic acid
124-04-9

Adipic acid

disodium-salt of/the/ adipic acid

disodium-salt of/the/ adipic acid

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: thionyl chloride / 1 h / 50 °C
2: 1.) triethylamine; 2.) 20percent HCl / 1.) chloroform, 35 deg C, 5 h; 2.) chloroform, reflux, 5 h
3: sodium hydroxide / ethanol / 1 h / Heating
4: 1.) hydrazine hydrate; 2.) potassium hydroxide / 1.) triethanolamine, 130 deg C; reflux, 4 h; 2.) triethanolamine, 200 deg C, 9 h
View Scheme
1,6-Bis(2-oxocyclohexyl)-1,6-hexandion
14208-97-0

1,6-Bis(2-oxocyclohexyl)-1,6-hexandion

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: sodium hydroxide / ethanol / 1 h / Heating
2: 1.) hydrazine hydrate; 2.) potassium hydroxide / 1.) triethanolamine, 130 deg C; reflux, 4 h; 2.) triethanolamine, 200 deg C, 9 h
View Scheme
Adipic acid dichloride
111-50-2

Adipic acid dichloride

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: 1.) triethylamine; 2.) 20percent HCl / 1.) chloroform, 35 deg C, 5 h; 2.) chloroform, reflux, 5 h
2: sodium hydroxide / ethanol / 1 h / Heating
3: 1.) hydrazine hydrate; 2.) potassium hydroxide / 1.) triethanolamine, 130 deg C; reflux, 4 h; 2.) triethanolamine, 200 deg C, 9 h
View Scheme
sebacoyl chloride
111-19-3

sebacoyl chloride

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: benzene / Hydrieren des Reaktionsprodukts an Palladium/Strontiumcarbonat in Butanon und erwaermen des Reaktionsgemisches.
2: aq.-ethanolic NaOH-solution
3: sodium hydroxide; diethylene glycol; hydrazine hydrate
View Scheme
Multi-step reaction with 3 steps
1: benzene / Hydrieren des Reaktionsprodukts an Palladium/Strontiumcarbonat in Butanon; Erwaermen des Reaktionsgemisches.
2: aq.-ethanolic NaOH-solution
3: sodium hydroxide; diethylene glycol; hydrazine hydrate
View Scheme
5,14-dioxo-octadecanedinitrile

5,14-dioxo-octadecanedinitrile

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: aq.-ethanolic NaOH-solution
2: sodium hydroxide; diethylene glycol; hydrazine hydrate
View Scheme
ethyl 6-chloro-6-oxohexanoate
1071-71-2

ethyl 6-chloro-6-oxohexanoate

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: benzene
2: aq. NaOH solution
3: hydrazine hydrate; potassium hydroxide; diethylene glycol / 200 °C
View Scheme
N-methyladipinimide
25077-25-2

N-methyladipinimide

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: diethyl ether / Erwaermen des Reaktionsprodukts mit Benzol
2: aqueous sulfuric acid
3: ethylene glycol; sodium; hydrazine hydrate
View Scheme
1,14-tetradecanediol
19812-64-7

1,14-tetradecanediol

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: HBr / 130 - 150 °C
2: Beim Verseifen des Reaktionsprodukts und Erhitzen
View Scheme
1,13-dimethoxy-tetradecane

1,13-dimethoxy-tetradecane

octadecanedioic acid
871-70-5

octadecanedioic acid

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: HBr / 130 - 150 °C
2: Beim Verseifen des Reaktionsprodukts und Erhitzen
View Scheme
methanol
67-56-1

methanol

octadecanedioic acid
871-70-5

octadecanedioic acid

dimethyl 1,18-octadecanedioate
1472-93-1

dimethyl 1,18-octadecanedioate

Conditions
ConditionsYield
With sulfuric acid for 16h; Reflux;99%
With sulfuric acid for 2h; Heating;97%
With sulfuric acid Reflux;97%
octadecanedioic acid
871-70-5

octadecanedioic acid

octadecane-1,18-diol
3155-43-9

octadecane-1,18-diol

Conditions
ConditionsYield
With lithium aluminium tetrahydride In tetrahydrofuran for 4h; Reflux;94%
Stage #1: octadecanedioic acid With lithium aluminium tetrahydride In tetrahydrofuran at 0℃; for 125h; Inert atmosphere; Reflux;
Stage #2: With water; sodium hydroxide In tetrahydrofuran pH=Ca. 10; Inert atmosphere;
77%
Multi-step reaction with 2 steps
1: 97 percent / H2SO4 / 2 h / Heating
2: 82 percent / Red-Al / tetrahydrofuran / 3 h / 20 °C
View Scheme
octadecanedioic acid
871-70-5

octadecanedioic acid

A

Hexadecane
544-76-3

Hexadecane

B

carbon monoxide
201230-82-2

carbon monoxide

Conditions
ConditionsYield
With hydrogen at 200℃; under 7500.75 Torr; for 24h; Microwave irradiation;A 92%
B n/a
octadecanedioic acid
871-70-5

octadecanedioic acid

podofilox
518-28-5

podofilox

C62H74O18

C62H74O18

Conditions
ConditionsYield
With dmap; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In dichloromethane at 20℃; for 6h; Inert atmosphere;88%
octadecanedioic acid
871-70-5

octadecanedioic acid

benzyl alcohol
100-51-6

benzyl alcohol

18-(benzyloxy)-18-oxooctadecanoic acid

18-(benzyloxy)-18-oxooctadecanoic acid

Conditions
ConditionsYield
With sulfuric acid In toluene Reagent/catalyst; Reflux;88%
octadecanedioic acid
871-70-5

octadecanedioic acid

toluene-4-sulfonic acid
104-15-4

toluene-4-sulfonic acid

1,16-hexadecyldiammonium ditosylate

1,16-hexadecyldiammonium ditosylate

Conditions
ConditionsYield
Stage #1: octadecanedioic acid With sodium azide; sulfuric acid In chloroform at 50℃; for 2h; Schmidt Reaction;
Stage #2: toluene-4-sulfonic acid
87%
octadecanedioic acid
871-70-5

octadecanedioic acid

oxacyclononadecane-2,19-dione

oxacyclononadecane-2,19-dione

Conditions
ConditionsYield
With acetic anhydride In dichloromethane at 20℃; for 3h;77%
7-[4-(2-chloroacetyl) piperazin-1-yl]-1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid

7-[4-(2-chloroacetyl) piperazin-1-yl]-1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid

octadecanedioic acid
871-70-5

octadecanedioic acid

C56H70F2N6O12
1350462-78-0

C56H70F2N6O12

Conditions
ConditionsYield
Stage #1: octadecanedioic acid With caesium carbonate In N,N-dimethyl-formamide at 50℃; for 1h;
Stage #2: 7-[4-(2-chloroacetyl) piperazin-1-yl]-1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid With tetra-(n-butyl)ammonium iodide In N,N-dimethyl-formamide at 50℃; for 72h;
70%
octadecanedioic acid
871-70-5

octadecanedioic acid

C65H83NO17

C65H83NO17

Conditions
ConditionsYield
With dmap; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In dichloromethane; N,N-dimethyl-formamide at 0 - 20℃; Inert atmosphere;60%
octadecanedioic acid
871-70-5

octadecanedioic acid

C38H67N5O24
1354944-97-0

C38H67N5O24

C94H164N10O50

C94H164N10O50

Conditions
ConditionsYield
Stage #1: octadecanedioic acid With N-ethyl-N,N-diisopropylamine; N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate In dimethyl sulfoxide for 0.166667h;
Stage #2: C38H67N5O24 In dimethyl sulfoxide at 20℃; for 3h;
59%
octadecanedioic acid
871-70-5

octadecanedioic acid

benzyl bromide
100-39-0

benzyl bromide

18-(benzyloxy)-18-oxooctadecanoic acid

18-(benzyloxy)-18-oxooctadecanoic acid

Conditions
ConditionsYield
With potassium hydrogencarbonate In 2-methyltetrahydrofuran; water at 75℃; for 30h;58.2%
octadecanedioic acid
871-70-5

octadecanedioic acid

N,N-dimethylformamide di-tert-butyl acetal
36805-97-7

N,N-dimethylformamide di-tert-butyl acetal

1,18-octadecanedioic acid mono-tert-butyl ester
843666-40-0

1,18-octadecanedioic acid mono-tert-butyl ester

Conditions
ConditionsYield
In toluene Concentration; Reflux;57.4%
In n-heptane; dichloromethane; toluene
carbazitaxel
183133-96-2

carbazitaxel

octadecanedioic acid
871-70-5

octadecanedioic acid

C108H144N2O30

C108H144N2O30

Conditions
ConditionsYield
With dmap; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In dichloromethane at 25℃; for 24h;56.5%
octadecanedioic acid
871-70-5

octadecanedioic acid

ciprofloxacin
85721-33-1

ciprofloxacin

C52H66F2N6O8
1350462-72-4

C52H66F2N6O8

Conditions
ConditionsYield
With benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In dichloromethane at 20℃; for 4h;53%
octadecanedioic acid
871-70-5

octadecanedioic acid

(6aR)-O10-(3-aminopropyl)apomorphine dihydrochloride

(6aR)-O10-(3-aminopropyl)apomorphine dihydrochloride

trifluoroacetic acid
76-05-1

trifluoroacetic acid

N1,N18-bis(3-(6aR)-(apomorphin-O10-yl)propyl)octadecanediamide ditrifluoroacetate

N1,N18-bis(3-(6aR)-(apomorphin-O10-yl)propyl)octadecanediamide ditrifluoroacetate

Conditions
ConditionsYield
Stage #1: octadecanedioic acid; (6aR)-O10-(3-aminopropyl)apomorphine dihydrochloride With (benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate; N-ethyl-N,N-diisopropylamine In dichloromethane at 20℃; for 2h; Inert atmosphere;
Stage #2: trifluoroacetic acid In water; acetonitrile
42%
triisopropylsilyl chloride
13154-24-0

triisopropylsilyl chloride

octadecanedioic acid
871-70-5

octadecanedioic acid

octadecanedioic acid mono-triisopropylsilyl ester

octadecanedioic acid mono-triisopropylsilyl ester

Conditions
ConditionsYield
With triethylamine In N,N-dimethyl-formamide at 60℃; Inert atmosphere;41%
With triethylamine In N,N-dimethyl-formamide at 60℃; Inert atmosphere;41%
1-hydroxy-pyrrolidine-2,5-dione
6066-82-6

1-hydroxy-pyrrolidine-2,5-dione

octadecanedioic acid
871-70-5

octadecanedioic acid

N-(17-carboxyheptadecanoyloxy)-succinimide

N-(17-carboxyheptadecanoyloxy)-succinimide

Conditions
ConditionsYield
With dmap; dicyclohexyl-carbodiimide In tetrahydrofuran for 0.5h;40%
octadecanedioic acid
871-70-5

octadecanedioic acid

6-(3-isopropyl-5-(piperidin-4-yl)-1H-indol-2-yl)-8-methoxy-[1,2,4]triazolo[1,5-a]pyridine

6-(3-isopropyl-5-(piperidin-4-yl)-1H-indol-2-yl)-8-methoxy-[1,2,4]triazolo[1,5-a]pyridine

1,18-bis(4-(3-isopropyl-2-(8-methoxy-[1,2,4]triazolo[1,5-a]pyridin-6-yl)-1H-indol-5-yl)piperidin-1-yl)octadecane-1,18-dione

1,18-bis(4-(3-isopropyl-2-(8-methoxy-[1,2,4]triazolo[1,5-a]pyridin-6-yl)-1H-indol-5-yl)piperidin-1-yl)octadecane-1,18-dione

Conditions
ConditionsYield
Stage #1: octadecanedioic acid With N-ethyl-N,N-diisopropylamine; HATU In N,N-dimethyl-formamide for 0.5h;
Stage #2: 6-(3-isopropyl-5-(piperidin-4-yl)-1H-indol-2-yl)-8-methoxy-[1,2,4]triazolo[1,5-a]pyridine In N,N-dimethyl-formamide for 2h;
35.5%
octadecanedioic acid
871-70-5

octadecanedioic acid

benzyl alcohol
100-51-6

benzyl alcohol

A

18-(benzyloxy)-18-oxooctadecanoic acid

18-(benzyloxy)-18-oxooctadecanoic acid

B

dibenzyl octadecanedioate

dibenzyl octadecanedioate

Conditions
ConditionsYield
Stage #1: octadecanedioic acid With dmap; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In tetrahydrofuran at 0℃;
Stage #2: benzyl alcohol In tetrahydrofuran at 0 - 20℃; for 16h;
A 28%
B 38 %Chromat.
octadecanedioic acid
871-70-5

octadecanedioic acid

9,10-dibromo-octadecanedioic acid dimethyl ester
23550-16-5

9,10-dibromo-octadecanedioic acid dimethyl ester

p-cresol
106-44-5

p-cresol

octadecanedioic acid
871-70-5

octadecanedioic acid

octadecanedioic acid di-p-tolyl ester
119039-48-4

octadecanedioic acid di-p-tolyl ester

Conditions
ConditionsYield
With naphthalene-2-sulfonate; xylene Entfernen des entstehenden H2O;
1,10-Decanediol
112-47-0

1,10-Decanediol

octadecanedioic acid
871-70-5

octadecanedioic acid

1,12-dioxa-cyclotriacontane-13,30-dione

1,12-dioxa-cyclotriacontane-13,30-dione

Conditions
ConditionsYield
at 200℃; under 2 Torr; Erhitzen des Reaktionsprodukts mit wenig Zinn(II)-chlorid-dihydrat unter 1 Torr auf 270grad;

Octadecanedioic acid Specification

This chemical is called Octadecanedioic acid, and it can also be named as 1,18-Octadecanedioic acid. With the CAS registry number of 871-70-5, its product categories are Alpha,Omega-Alkane Dicarboxylic Acids; Alpha, Omega-Bifunctional Alkanes; Monofunctional & Alpha,Omega-Bifunctional Alkanes. Additionally, this chemical is white crystalline powder.

Other characteristics of the Octadecanedioic acid can be summarised as followings: (1)ACD/LogP: 6.11; (2)# of Rule of 5 Violations: 1; (3)ACD/LogD (pH 5.5): 4.52; (4)ACD/LogD (pH 7.4): 1.5; (5)ACD/BCF (pH 5.5): 666.11; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 1288.87; (8)ACD/KOC (pH 7.4): 1.22; (9)#H bond acceptors: 4; (10)#H bond donors: 2; (11)#Freely Rotating Bonds: 17; (12)Polar Surface Area: 52.6 Å2; (13)Index of Refraction: 1.474; (14)Molar Refractivity: 88.56 cm3; (15)Molar Volume: 314.9 cm3; (16)Polarizability: 35.11×10-24cm3; (17)Surface Tension: 39.9 dyne/cm; (18)Density: 0.998 g/cm3; (19)Flash Point: 258.8 °C; (20)Enthalpy of Vaporization: 81.66 kJ/mol; (21)Boiling Point: 480.9 °C at 760 mmHg; (22)Vapour Pressure: 1.43E-10 mmHg at 25°C.

Production method of this chemical: The Octadecanedioic acid could be obtained by the reactant of C26H42O8. This reaction needs the reagent of conc. HCl, and the solvent of H2O. The yield is 98 %. The other condition is heating.

When you are using this chemical, please be cautious about it as the following: This chemical is irritating to eyes, respiratory system and skin. You should wear suitable protective clothing when you use it. In case of contacting with eyes, rinse immediately with plenty of water and seek medical advice.

You can still convert the following datas into molecular structure: 
1.SMILES: O=C(O)CCCCCCCCCCCCCCCCC(=O)O
2.InChI: InChI=1/C18H34O4/c19-17(20)15-13-11-9-7-5-3-1-2-4-6-8-10-12-14-16-18(21)22/h1-16H2,(H,19,20)(H,21,22)
3.InChIKey: BNJOQKFENDDGSC-UHFFFAOYAE

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