28-methyl ester, 3-nitrile of (4R)-23-hydroxy-3,4-secolupane-3,28-dioic acid

28-methyl ester, 3-nitrile of (4R)-4-benzoyloxy-24-nor-3,4-secolupane-3,28-dioic acid

28-methyl ester, 3-nitrile of (4R)-4-hydroxy-24-nor-3,4-secolupane-3,28-dioic acid

(3S,4S,5R,8R,9R,10R,13S,14R,15S)-4-(2-Cyano-ethyl)-3-isopropenyl-15-isopropyl-4,9,10-trimethyl-hexadecahydro-cyclopenta[a]phenanthrene-13-carboxylic acid methyl ester