Finasteride EP Impurity B

(4aR,4bS,6aS,7S,9aS,9bS,11aR)-2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a-Tetradecahydro-4a,6a-dimethyl-2-oxo-1H-indeno[5,4-f]quinoline-7-carboxylic Acid Methyl Ester;|(5α,17β)-3-Oxo-4-azaandrost-1-ene-17-carboxylic Acid Methyl Ester; Methyl 3-Oxo-4-aza-5α-androst-1-ene-17β-carboxylate;|103335-41-7; AKOS015963143; AN-15725; BC214720;|3-Oxo-4-aza-5α-αndrost-1-ene-17β-carboxylic acid methyl ester ;|Dutasteride Ester Impurity.|Dutasteride Methyl Ester Analog|Finasteride Methyl Ester Analog ;|Finasteride USP RC D ;|Finasteride USP RC D ; Finasteride Methyl Ester Analog ; Dutasteride Methyl Ester Analog ; 3-Oxo-4-aza-5?-?ndrost-1-ene-17?-carboxylic acid methyl ester ;|methyl (1S,5aR,9aR,11aS)-9a,11a-dimethyl-7-oxo-1,2,3,3a,3b,4,5,5a,6,9b,10,11-dodecahydroindeno[5,4-f]quinoline-1-carboxylate;|Methyl 3-oxo-4-aza-5a-androst-1-ene-17ß-carboxylate|Methyl 4-aza-5alpha-Androsta-1-en-3-one-17beta-Carboxylate;