(1S,3aS,3bS,9aR,9bS,11aS)-1-tert-Butylcarbamoyl-9a,11a-dimethyl-7-oxo-1,2,3,3a,3b,4,7,8,9,9a,9b,10,11,11a-tetradecahydro-cyclopenta[i]phenanthridine-5-carboxylic acid tert-butyl ester

(1S,3aS,4S,5S,7aS)-4-Carboxymethyl-7a-methyl-5-((1R,4S)-1-methyl-2-oxo-4-triisopropylsilanyloxy-cyclohexyl)-octahydro-indene-1-carboxylic acid methyl ester

(1S,3aS,3bS,7S,9aR,9bS,11aS)-7-Hydroxy-9a,11a-dimethyl-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

17β-carbomethoxy-6-t-butoxycarbonyl-6-azaandrost-4-en-3-one

(1S,3aS,4S,5S,7aS)-7a-Methyl-5-((1R,4S)-1-methyl-2-oxo-4-triisopropylsilanyloxy-cyclohexyl)-4-(2-oxo-ethyl)-octahydro-indene-1-carboxylic acid methyl ester

(1S,3aS,4S,5S,7aS)-4-Chlorocarbonylmethyl-7a-methyl-5-((1R,4S)-1-methyl-2-oxo-4-triisopropylsilanyloxy-cyclohexyl)-octahydro-indene-1-carboxylic acid methyl ester

(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