21-bromo-3β,17α-dihydroxy-5-pregnen-20-one

(8R,9S,10R,13S,14S,17R)-17-(2-acetoxy-1-(formylimino)ethyl)-10,13-dimethyl-1,2,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydrospiro[cyclopenta[a]phenanthrene-3,2'-[1,3]dioxolan]-17-yl acetate

甲醇

17.20βF-dihydroxy-3-oxo-pregnen-(4)-al-(21)

去氧皮质酮