19-Norandrostenedione CAS 734-32-7

Usage: Intermediate of norethisterone, testosterone propionate, and norethinyl propionate. The production method oxidizes androsterol-4-en-19-methanol-3,17-dione with chromium Chemicalbook anhydride concentrated sulfuric acid to produce thiosterol-4-en-19-carboxy-3,17-dione, which is then decarboxylated in pyridine under nitrogen supply to obtain the product.