methyl-3-oxo-4-methyl-4-aza-5α-androstane-17β-carboxylate

3β,5α-dihydroxy-17β-hydroxymethylandrostane

17β-carbomethoxy-3,5-dioxo-6-nitrilo-5,6-secoandrostane

(1S,3aS,3bS,7S,9aR,9bS,11aS)-9a,11a-Dimethyl-7-triisopropylsilanyloxy-1,2,3,3a,3b,4,7,8,9,9a,9b,10,11,11a-tetradecahydro-cyclopenta[i]phenanthridine-1,5-dicarboxylic acid 5-tert-butyl ester 1-methyl ester