115019-36-8
(E)-ethyl 3β-(tert-buthyldimethylsiloxy)pregna-5,17-(20)-dien-21-oate
→
115019-40-4
(20S)-3β-(tert-butyldimethylsilyloxy)-20-hydroxymethylpregna-5,16(17)-diene
80-97-7
3β-胆甾烷醇