ethinylestradiol and its Impurities
A synthetic steroidal estrogen and a derivative of estradiol, Ethinylestradiol is used as a formulation in Combine oral contraceptives. Also known as EE2 it is used in the hormone replacement therapy in menopause , acne, and cancer (breat and prostrate). Reference standards of Ethinylestradiol API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.
(8R,9S,13S,14S,17S)-1,13-dimethyl-17-((trimethylsilyl)ethynyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
(8R,9S,13S,14S,17S)-1,13-dimethyl-17-((trimethylsilyl)ethynyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
Catalogue No.:PAI 05 005060
CAS :
NA
Molecular Formula : C24H34O2Si
Molecular Weight : 382.62
(Z)-2-((3R,3aS,5aS,9aR,9bS,Z)-3-Ethynyl-3-hydroxy-3a-methyl-6-(2-oxoethylidene)dodecahydro-7H-cyclopenta[a]naphthalen-7-ylidene)acetic Acid
(Z)-2-((3R,3aS,5aS,9aR,9bS,Z)-3-Ethynyl-3-hydroxy-3a-methyl-6-(2-oxoethylidene)dodecahydro-7H-cyclopenta[a]naphthalen-7-ylidene)acetic Acid
Catalogue No.:PA 05 46550
CAS :
NA
Molecular Formula : C20H24O4
Molecular Weight : 328.41
(Z)-2-((3R,3aS,5aS,9aR,9bS)-3-Ethynyl-3-hydroxy-3a,6-dimethyldodecahydro-7H-cyclopenta[a]naphthalen-7-ylidene)acetic Acid
(Z)-2-((3R,3aS,5aS,9aR,9bS)-3-Ethynyl-3-hydroxy-3a,6-dimethyldodecahydro-7H-cyclopenta[a]naphthalen-7-ylidene)acetic Acid
Catalogue No.:PA 05 46560
CAS :
NA
Molecular Formula : C19H26O3
Molecular Weight : 302.41
(2Z,2'Z)-2,2'-((3R,3aS,5aS,9aR,9bS)-3-Ethynyl-3-hydroxy-3a-methyldecahydro-1H-cyclopenta[a]naphthalene-6,7-diylidene)diacetic acid
(2Z,2'Z)-2,2'-((3R,3aS,5aS,9aR,9bS)-3-Ethynyl-3-hydroxy-3a-methyldecahydro-1H-cyclopenta[a]naphthalene-6,7-diylidene)diacetic acid
Catalogue No.:PA 05 46570
CAS :
1006654-79-0
Molecular Formula : C20H24O5
Molecular Weight : 344.41
2-((3R,3aS,5aS,9aR,9bS,Z)-7-(Carboxymethylene)-3-ethynyl-3-hydroxy-3a-methyldodecahydro-1H-cyclopenta[a]naphthalen-6-yl)-2-oxoacetic acid
2-((3R,3aS,5aS,9aR,9bS,Z)-7-(Carboxymethylene)-3-ethynyl-3-hydroxy-3a-methyldodecahydro-1H-cyclopenta[a]naphthalen-6-yl)-2-oxoacetic acid
Catalogue No.:PA 05 46580
CAS :
NA
Molecular Formula : C20H24O6
Molecular Weight : 360.41
2-((3R,3aS,5aS,9aR,9bS)-7-(Carboxy(hydroxy)methyl)-3-ethynyl-3-hydroxy-3a-methyldodecahydro-1H-cyclopenta[a]naphthalen-6-yl)-2-oxoacetic Acid
2-((3R,3aS,5aS,9aR,9bS)-7-(Carboxy(hydroxy)methyl)-3-ethynyl-3-hydroxy-3a-methyldodecahydro-1H-cyclopenta[a]naphthalen-6-yl)-2-oxoacetic Acid
Catalogue No.:PA 05 46590
CAS :
NA
Molecular Formula : C20H26O7
Molecular Weight : 378.42
(3R,3aS,5aS,9aR,9bS)-6-(Carboxycarbonyl)-3-ethynyl-3-hydroxy-3a-methyldodecahydrospiro[cyclopenta[a]naphthalene-7,3'-[1,2]dioxetane]-4'-carboxylic Acid
(3R,3aS,5aS,9aR,9bS)-6-(Carboxycarbonyl)-3-ethynyl-3-hydroxy-3a-methyldodecahydrospiro[cyclopenta[a]naphthalene-7,3'-[1,2]dioxetane]-4'-carboxylic Acid
Catalogue No.:PA 05 46600
CAS :
NA
Molecular Formula : C20H24O8
Molecular Weight : 392.4
2-((3R,3aS,5aS,9aR,9bS)-7-(Carboxy(hydroperoxy)methyl)-3-ethynyl-3-hydroxy-3a-methyldodecahydro-1H-cyclopenta[a]naphthalen-6-yl)-2-oxoacetic Acid
2-((3R,3aS,5aS,9aR,9bS)-7-(Carboxy(hydroperoxy)methyl)-3-ethynyl-3-hydroxy-3a-methyldodecahydro-1H-cyclopenta[a]naphthalen-6-yl)-2-oxoacetic Acid
Catalogue No.:PA 05 46610
CAS :
NA
Molecular Formula : C20H26O8
Molecular Weight : 394.42
(Z)-2-((3R,3aS,9aS,9bS)-3-ethynyl-6-formyl-3-hydroxy-3a-methyl-1,2,3,3a,4,5,8,9,9a,9b-decahydro-7H-cyclopenta[a]naphthalen-7-ylidene)acetic acid
(Z)-2-((3R,3aS,9aS,9bS)-3-ethynyl-6-formyl-3-hydroxy-3a-methyl-1,2,3,3a,4,5,8,9,9a,9b-decahydro-7H-cyclopenta[a]naphthalen-7-ylidene)acetic acid
Catalogue No.:PA 05 46620
CAS :
NA
Molecular Formula : C19H22O4
Molecular Weight : 314.38
(8R,9S,14S,17S)-17-Ethynyl-17-hydroxy-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-3-one
(8R,9S,14S,17S)-17-Ethynyl-17-hydroxy-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-3-one
Catalogue No.:PA 05 46630
CAS :
1436392-24-3
Molecular Formula : C19H22O2
Molecular Weight : 282.38
(8R,9S,13S,14S,17R)-17-Ethynyl-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,6,17-triol
(8R,9S,13S,14S,17R)-17-Ethynyl-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,6,17-triol
Catalogue No.:PA 05 46640
CAS :
108646-70-4
Molecular Formula : C20H24O3
Molecular Weight : 312.41
1,2,6b,7,8,8a,9a,10,10a,10b-Decahydro-8bH-naphtho[2',1':4,5]indeno[1,2-b]oxirene-4,8b-diyl Diacetate
1,2,6b,7,8,8a,9a,10,10a,10b-Decahydro-8bH-naphtho[2',1':4,5]indeno[1,2-b]oxirene-4,8b-diyl Diacetate
Catalogue No.:PAI 05 005203
CAS :
NA
Molecular Formula : C21H24O5
Molecular Weight : 356.42
(17S)-17-Ethynyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,16,17-triol
(17S)-17-Ethynyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,16,17-triol
Catalogue No.:PAI 05 005205
CAS :
NA
Molecular Formula : C19H22O3
Molecular Weight : 298.38
(8R,9S,13S,14S,17S)-17-Ethynyl-3,17-dihydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-6-one
(8R,9S,13S,14S,17S)-17-Ethynyl-3,17-dihydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-6-one
Catalogue No.:PAI 05 005206
CAS :
NA
Molecular Formula : C20H22O3
Molecular Weight : 310.39
(8R,9S,13S,14S,17S)-17-Ethynyl-13-methyl-6-oxo-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diyl Diacetate
(8R,9S,13S,14S,17S)-17-Ethynyl-13-methyl-6-oxo-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diyl Diacetate
Catalogue No.:PAI 05 005207
CAS :
NA
Molecular Formula : C24H26O5
Molecular Weight : 394.47
(6S,8R,9S,13S,14S,17S)-17-Ethynyl-6-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diyl Diacetate
(6S,8R,9S,13S,14S,17S)-17-Ethynyl-6-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diyl Diacetate
Catalogue No.:PAI 05 005208
CAS :
NA
Molecular Formula : C24H28O5
Molecular Weight : 396.48
(8R,9S,13S,14S)-3-Methoxy-4,13-dimethyl-6,7,8,9,11,12,13,14,15,16-decahydro-17H-cyclopenta[a]phenanthren-17-one
(8R,9S,13S,14S)-3-Methoxy-4,13-dimethyl-6,7,8,9,11,12,13,14,15,16-decahydro-17H-cyclopenta[a]phenanthren-17-one
Catalogue No.:PAI 05 005211
CAS :
NA
Molecular Formula : C20H26O2
Molecular Weight : 298.43
(8R,9S,13S,14S)-3,4,13-Trimethyl-6,7,8,9,11,12,13,14,15,16-decahydro-17H-cyclopenta[a]phenanthren-17-one
(8R,9S,13S,14S)-3,4,13-Trimethyl-6,7,8,9,11,12,13,14,15,16-decahydro-17H-cyclopenta[a]phenanthren-17-one
Catalogue No.:PAI 05 005212
CAS :
NA
Molecular Formula : C20H26O
Molecular Weight : 282.43
(13S,17R)-17-ethynyl-3-hydroxy-13-methyl-6-oxo-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate
(13S,17R)-17-ethynyl-3-hydroxy-13-methyl-6-oxo-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate
Catalogue No.:PAI 05 005213
CAS :
NA
Molecular Formula : C22H24O4
Molecular Weight : 352.43
(8R,9S,13S,14S)-3-((Tert-butyldimethylsilyl)oxy)-1,13-dimethyl-6,7,8,9,11,12,13,14,15,16-decahydro-17H-cyclopenta[a]phenanthren-17-one
(8R,9S,13S,14S)-3-((Tert-butyldimethylsilyl)oxy)-1,13-dimethyl-6,7,8,9,11,12,13,14,15,16-decahydro-17H-cyclopenta[a]phenanthren-17-one
Catalogue No.:PAI 05 005214
CAS :
NA
Molecular Formula : C25H38O2Si
Molecular Weight : 398.66
(8R,9S,13S,14S)-4-Bromo-13-methyl-17-oxo-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-3-yl acetate
(8R,9S,13S,14S)-4-Bromo-13-methyl-17-oxo-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-3-yl acetate
Catalogue No.:PAI 05 005215
CAS :
NA
Molecular Formula : C20H23BrO3
Molecular Weight : 391.31
(8R,9S,13S,14S)-4,13-Dimethyl-17-oxo-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-3-yl acetate
(8R,9S,13S,14S)-4,13-Dimethyl-17-oxo-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-3-yl acetate
Catalogue No.:PAI 05 005216
CAS :
NA
Molecular Formula : C21H26O3
Molecular Weight : 326.44
(8R,9S,13S,14S)-3-Hydroxy-4,13-dimethyl-6,7,8,9,11,12,13,14,15,16-decahydro-17H-cyclopenta[a]phenanthren-17-one
(8R,9S,13S,14S)-3-Hydroxy-4,13-dimethyl-6,7,8,9,11,12,13,14,15,16-decahydro-17H-cyclopenta[a]phenanthren-17-one
Catalogue No.:PAI 05 005217
CAS :
NA
Molecular Formula : C19H24O2
Molecular Weight : 284.4
(8S,9S,10S,11S,13S,14S)-17-Acetyl-11-hydroxy-10,13-dimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15-decahydro-3H-cyclopenta[a]phenanthren-2-yl acetate
(8S,9S,10S,11S,13S,14S)-17-Acetyl-11-hydroxy-10,13-dimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15-decahydro-3H-cyclopenta[a]phenanthren-2-yl acetate
Catalogue No.:PA 05 0461004
CAS :
NA
Molecular Formula : C23H28O5
Molecular Weight : 384.47
(8R,9S,13S,14S,17R)-1,13-Dimethyl-17-((trimethylsilyl)ethynyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
(8R,9S,13S,14S,17R)-1,13-Dimethyl-17-((trimethylsilyl)ethynyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
Catalogue No.:PAI 05 005218
CAS :
NA
Molecular Formula : C24H34O2Si
Molecular Weight : 382.62
(8R,9S,13S,14S,17S)-17-Ethynyl-2,13-dimethyl-8,9,12,13,14,15,16,17-octahydro-11H-cyclopenta[a]phenanthrene-3,17-diol
(8R,9S,13S,14S,17S)-17-Ethynyl-2,13-dimethyl-8,9,12,13,14,15,16,17-octahydro-11H-cyclopenta[a]phenanthrene-3,17-diol
Catalogue No.:PA 05 0461005
CAS :
1818-11-7
Molecular Formula : C21H24O2
Molecular Weight : 308.42
(8R,9S,13S,14S,17R)-4,13-Dimethyl-17-((trimethylsilyl)ethynyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol;
(8R,9S,13S,14S,17R)-4,13-Dimethyl-17-((trimethylsilyl)ethynyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol;
Catalogue No.:PAI 05 005219
CAS :
NA
Molecular Formula : C24H34O2Si
Molecular Weight : 382.62
(8S,13S,14S,17R)-17-ethynyl-9-hydroperoxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
(8S,13S,14S,17R)-17-ethynyl-9-hydroperoxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
Catalogue No.:PA 05 0461006
CAS :
303014-86-0
Molecular Formula : C20H24O4
Molecular Weight : 328.41
(6S,8R,9S,13S,14S,17S)-17-Ethynyl-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,6,17-triol
(6S,8R,9S,13S,14S,17S)-17-Ethynyl-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,6,17-triol
Catalogue No.:PA 05 0461008
CAS :
24380-05-0
Molecular Formula : C20H24O3
Molecular Weight : 312.41
(8R,9S,13S,14S,17R)-2-((Dimethylamino)methyl)-17-ethynyl-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
(8R,9S,13S,14S,17R)-2-((Dimethylamino)methyl)-17-ethynyl-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
Catalogue No.:PAI 05 005220
CAS :
100456-57-3
Molecular Formula : C23H31NO2
Molecular Weight : 353.51
(8R,9S,13S,14S,16R,17S)-13-Methyl-17-((trimethylsilyl)ethynyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,16,17-triol
(8R,9S,13S,14S,16R,17S)-13-Methyl-17-((trimethylsilyl)ethynyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,16,17-triol
Catalogue No.:PAI 05 005221
CAS :
NA
Molecular Formula : C23H32O3Si
Molecular Weight : 384.59
(6bS,8aS,8bS,9aR,10aS,10bR)-8b-Ethynyl-8a-methyl-2,6b,7,8,8a,8b,9a,10,10a,10b-decahydro-1H-naphtho[2',1':4,5]indeno[1,2-b]oxiren-4-yl acetate
(6bS,8aS,8bS,9aR,10aS,10bR)-8b-Ethynyl-8a-methyl-2,6b,7,8,8a,8b,9a,10,10a,10b-decahydro-1H-naphtho[2',1':4,5]indeno[1,2-b]oxiren-4-yl acetate
Catalogue No.:PAI 05 005223
CAS :
55812-84-5
Molecular Formula : C22H24O3
Molecular Weight : 336.43
(8R,9S,13S,14S,17R)-3-Acetoxy-17-ethynyl-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl 4-nitrobenzoate
(8R,9S,13S,14S,17R)-3-Acetoxy-17-ethynyl-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl 4-nitrobenzoate
Catalogue No.:PAI 05 005225
CAS :
NA
Molecular Formula : C29H29NO6
Molecular Weight : 487.55
(8R,9S,13S,14S,17S)-3-Acetoxy-17-ethynyl-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl 4-nitrobenzoate
(8R,9S,13S,14S,17S)-3-Acetoxy-17-ethynyl-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl 4-nitrobenzoate
Catalogue No.:PAI 05 005226
CAS :
NA
Molecular Formula : C29H29NO6
Molecular Weight : 487.55
(8R,9S,13S,14S,16R,17R)-17-Ethynyl-17-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,16-diyl Diacetate
(8R,9S,13S,14S,16R,17R)-17-Ethynyl-17-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,16-diyl Diacetate
Catalogue No.:PAI 05 005229
CAS :
7055-73-4
Molecular Formula : C24H28O5
Molecular Weight : 396.48