英文名称
3-Oxo-4-aza-5a-androst-1-ene-17b-carboxylic Acid Methyl Ester
Chloroform (Slightly), DMSO (Slightly, Heated), Methanol (Slightly, Heated)
Standards; Steroids; Pharmaceutical/API Drug Impurities/Metabolites;
3-Oxo-4-aza-5a-androst-1-ene-17b-carboxylic Acid Methyl Ester (Finasteride EP Impurity B) is an impurity of Finasteride (F342000) and Dutasteride (D735000). An intermediate in the synthesis of Finasteride and Dutasteride, 5a-reductase inhibitors used for treatment of benign prostatic hyperplasia acne, seborrhea, female hirsutism, prostatitis, and prostatic carcinoma and other hyperandrogenetic related disorders. Finasteride impurity.