17b-(tert-Butylcarbamoyl)-4-aza-5a-androsten-3-one

N-叔丁基-3-酮-4-氮杂-5a-雄甾烯-17b-酰胺

Also known as: 17β-(t-Butylcarbamoyl)-4-aza-5α-androsten-3-one, Finasteride Impurity 5, Finasteride Impurity 9, Finasteride Impurity 13, Finasteride Impurity 19, Finasteride Impurity 44, Finasteride intermediate, N-t-Butyl-3-oxo-4-aza-5-androsten-17β-carboxamide, (4aR,4bS,6aS,7S,9aS,9bS)-N-(1,1-dimethylethyl)-2,3,4,4a,4b,5,6,6a,7,8,9,9a,9b,10-tetradecahydro-4a,6a-dimethyl-2-oxo-1H-indeno[5,4-f]quinoline-7-carboxamide, (1S,3aS,3bS,5aR,9aR,9bS)-N-tert-butyl-9a-methyl-7-oxo-2,3,3a,3b,4,5,5a,6,9b,10,11,11a-dodecahydro-1H-indeno[5,4-f]quinoline-1-carboxamide

17b-(tert-Butylcarbamoyl)-4-aza-5a-androsten-3-one (CAS 166896-74-8) is a compound in the Organic Bases category listed in the Jingsj chemical database. It has the molecular formula C23H36N2O2 and a molecular weight of 372.544 g/mol. It is also known as 17β-(t-Butylcarbamoyl)-4-aza-5α-androsten-3-one, Finasteride Impurity 5 and Finasteride Impurity 9. Key properties include a melting point of 289-293ºC, a boiling point of 588.5±50.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 183.0±30.3 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

166896-74-8

Jingsj CID

J-1092313-9

Molecular Formula

C₂₃H₃₆N₂O₂

Chinese Name

N-叔丁基-3-酮-4-氮杂-5a-雄甾烯-17b-酰胺

Molecular Weight

372.544 g/mol

Category

Organic Bases

Last updated

8/21/2026