 
- 
                        Phosphonic acid, [(2R)-2,3-dihydroxy-2-phenylpropyl]-, diethyl esterCAS:828268-16-2Formula:C13H21O5P 
                     
- 
                        Phosphonic acid, [1-(5-methyl-2-furanyl)-3-oxobutyl]-, diethyl esterCAS:89901-53-1Formula:C13H21O5P 
                     
- 
                        Phosphonic acid, [[5-(1-methyl-3-oxopropyl)-2-furanyl]methyl]-, diethyl
esterCAS:93639-50-0Formula:C13H21O5P 
                     
- 
                        Phosphonic acid, (diethoxymethyl)-, ethyl phenyl esterCAS:23587-54-4Formula:C13H21O5P 
                     
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                        Phosphonic acid,
[2-[(1R,5S)-2-oxo-3-oxabicyclo[3.1.0]hex-6-yl]ethenyl]-,
bis(1-methylethyl) ester, rel-CAS:649764-78-3Formula:C13H21O5P 
                     
- 
                        Phosphonic acid, [3-(3,3-dimethyloxiranyl)-3-oxopropyl]-, di-2-propenyl
esterCAS:65130-96-3Formula:C13H21O5P 
                     
- 
                        Phosphoric acid, 3-(1,1-dimethylethyl)-4-methoxyphenyl dimethyl esterCAS:94444-80-1Formula:C13H21O5P 
                     
- 
                        2-Propenoic acid, 3-cyclohexylidene-2-(dimethoxyphosphinyl)-, ethyl
esterCAS:345908-54-5Formula:C13H21O5P 
                     
- 
                        Phosphonic acid, [[3-(methoxymethoxy)phenyl]methyl]-, diethyl esterCAS:865761-84-8Formula:C13H21O5P 
                     
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                        Phosphonic acid, [(2S)-2-hydroxy-2-(4-methoxyphenyl)ethyl]-, diethyl
esterCAS:450406-85-6Formula:C13H21O5P