dutasteride and its Impurities
Dutasteride is used for treating benign prostatic hyperplasia. It is sold under the brand name Avodart.. Reference standards of Dutasteride API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below


(4aR,4bS,6aS,7S,9aS,9bS,11aR)-N-(2,5-bis(Trifluoromethyl)phenyl)-4-hydroxy-4a,6a-dimethyl-2-oxohexadecahydro-1H-indeno[5,4-f]quinoline-7-carboxamide
(4aR,4bS,6aS,7S,9aS,9bS,11aR)-N-(2,5-bis(Trifluoromethyl)phenyl)-4-hydroxy-4a,6a-dimethyl-2-oxohexadecahydro-1H-indeno[5,4-f]quinoline-7-carboxamide
Catalogue No.:PA 04 86550
CAS :
NA
Molecular Formula : C27H32F6N2O3
Molecular Weight : 546.55


(4aR,4bS,6aS,7S,9aS,9bS,11aS)-4a,6a-Dimethyl-2-oxo-2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a-tetradecahydro-1H-indeno[5,4-f]quinoline-7-carboxylic Acid
(4aR,4bS,6aS,7S,9aS,9bS,11aS)-4a,6a-Dimethyl-2-oxo-2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a-tetradecahydro-1H-indeno[5,4-f]quinoline-7-carboxylic Acid
Catalogue No.:PA 04 86560
CAS :
NA
Molecular Formula : C19H27NO3
Molecular Weight : 317.43


(3S,3aS,5aS,6R,9aS,9bS)-6-(2-Carboxyethyl)-3a,6-dimethyl-7-oxododecahydro-1H-cyclopenta[a]naphthalene-3-carboxylic Acid
(3S,3aS,5aS,6R,9aS,9bS)-6-(2-Carboxyethyl)-3a,6-dimethyl-7-oxododecahydro-1H-cyclopenta[a]naphthalene-3-carboxylic Acid
Catalogue No.:PAI 04 022051
CAS :
NA
Molecular Formula : C19H28O5
Molecular Weight : 336.43


(3S,3aS,5aS,6R,9aS,9bS)-3-[[[2,5-Bis(trifluoromethyl)phenyl]amino]carbonyl]dodecahydro-3a,6-dimethyl-7-oxo-1H-benz[e]indene-6-propanoic Acid
(3S,3aS,5aS,6R,9aS,9bS)-3-[[[2,5-Bis(trifluoromethyl)phenyl]amino]carbonyl]dodecahydro-3a,6-dimethyl-7-oxo-1H-benz[e]indene-6-propanoic Acid
Catalogue No.:PAI 04 022054
CAS :
164656-20-6
Molecular Formula : C27H31F6NO4
Molecular Weight : 547.54


(4aR,6aS,7S)-4a,6a-Dimethyl-2-oxo-2,4a,4b,5,6,6a,7,8,9,9a,9b,10-dodecahydro-1H-indeno[5,4-f]quinoline-7-carboxamide
(4aR,6aS,7S)-4a,6a-Dimethyl-2-oxo-2,4a,4b,5,6,6a,7,8,9,9a,9b,10-dodecahydro-1H-indeno[5,4-f]quinoline-7-carboxamide
Catalogue No.:PAI 04 022055
CAS :
NA
Molecular Formula : C19H26N2O2
Molecular Weight : 314.43


(10R,13S)-N-(2,5-bis(Trifluoromethyl)phenyl)-10,13-dimethyl-3-oxo-4,5,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthrene-17-carboxamide
(10R,13S)-N-(2,5-bis(Trifluoromethyl)phenyl)-10,13-dimethyl-3-oxo-4,5,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthrene-17-carboxamide
Catalogue No.:PAI 04 022056
CAS :
NA
Molecular Formula : C28H31F6NO2
Molecular Weight : 527.55


3-((3aS,6R)-3-((2,5-bis(Trifluoromethyl)phenyl)carbamoyl)-3a,6-dimethyl-7-oxododecahydro-1H-cyclopenta[a]naphthalen-6-yl)propanoic Acid
3-((3aS,6R)-3-((2,5-bis(Trifluoromethyl)phenyl)carbamoyl)-3a,6-dimethyl-7-oxododecahydro-1H-cyclopenta[a]naphthalen-6-yl)propanoic Acid
Catalogue No.:PAI 04 022057
CAS :
NA
Molecular Formula : C27H31F6NO4
Molecular Weight : 547.54


(4aR,6aS)-N-(2,5-bis(Trifluoromethyl)phenyl)-4a,6a-dimethyl-2-oxo-2,3,4,4a,4b,5,6,6a,7,8,9,9a,9b,10-tetradecahydro-1H-indeno[5,4-f]quinoline-7-carboxamide
(4aR,6aS)-N-(2,5-bis(Trifluoromethyl)phenyl)-4a,6a-dimethyl-2-oxo-2,3,4,4a,4b,5,6,6a,7,8,9,9a,9b,10-tetradecahydro-1H-indeno[5,4-f]quinoline-7-carboxamide
Catalogue No.:PAI 04 022058
CAS :
NA
Molecular Formula : C27H30F6N2O2
Molecular Weight : 528.54


(4aR,4bS,6aS,7S,9aS,9bS,11aS)-4a,6a-Dimethyl-2-oxohexadecahydro-1H-indeno[5,4-f]quinoline-7-carboxylic acid
(4aR,4bS,6aS,7S,9aS,9bS,11aS)-4a,6a-Dimethyl-2-oxohexadecahydro-1H-indeno[5,4-f]quinoline-7-carboxylic acid
Catalogue No.:PA 04 0861002
CAS :
1430804-94-6
Molecular Formula : C19H29NO3
Molecular Weight : 319.45


Methyl (4aR,4bS,6aS,7S,9aS,9bS,11aR)-1-((4aR,4bS,6aS,7S,9aS,9bS,11aR)-4a,6a-dimethyl-2-oxo-2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a-tetradecahydro-1H-indeno[5,4-f]quinoline-7-carbonyl)-4a,6a-dimethyl-2-oxo-2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a-tetradecahydro-1H-indeno[5,4-f]quinoline-7-carboxylate
Methyl (4aR,4bS,6aS,7S,9aS,9bS,11aR)-1-((4aR,4bS,6aS,7S,9aS,9bS,11aR)-4a,6a-dimethyl-2-oxo-2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a-tetradecahydro-1H-indeno[5,4-f]quinoline-7-carbonyl)-4a,6a-dimethyl-2-oxo-2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a-tetradecahydro-1H-indeno[5,4-f]quinoline-7-carboxylate
Catalogue No.:PAI 04 022059
CAS :
NA
Molecular Formula : C39H54N2O5
Molecular Weight : 630.87


(4aR,4bS,6aS,7S,9aS,9bS,11aR)-1-((4aR,4bS,6aS,7S,9aS,9bS,11aR)-4a,6a-Dimethyl-2-oxo-2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a-tetradecahydro-1H-indeno[5,4-f]quinoline-7-carbonyl)-4a,6a-dimethyl-2-oxo-2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a-tetradecahydro-1H-indeno[5,4-f]quinoline-7-carboxylic Acid
(4aR,4bS,6aS,7S,9aS,9bS,11aR)-1-((4aR,4bS,6aS,7S,9aS,9bS,11aR)-4a,6a-Dimethyl-2-oxo-2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a-tetradecahydro-1H-indeno[5,4-f]quinoline-7-carbonyl)-4a,6a-dimethyl-2-oxo-2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a-tetradecahydro-1H-indeno[5,4-f]quinoline-7-carboxylic Acid
Catalogue No.:PAI 04 022060
CAS :
NA
Molecular Formula : C38H52N2O5
Molecular Weight : 616.84