(1S,3aS,5aR,5bR,7aR,11aR,11bR,13aR,13bR)-10-Formyl-1-isopropyl-5a,5b,8,8,11a-pentamethyl-9-oxo-1,2,3,4,5,5a,5b,6,7,7a,8,9,11a,11b,12,13,13a,13b-octadecahydro-cyclopenta[a]chrysene-3a-carboxylic acid methyl ester

methyl 2-cyano-lup-1-en-3-oxo-20-oate

methyl lup-2-eno[2,3-d]isoxazol-28-oate

methyl (5S,5aR,7aR,7bR,9aS,12S,12aR,12bR,14aR,14bR)-12-isopropyl-5,7a,7b,14b-tetramethyl-3-oxoicosahydro-9aH-cyclopenta[7,8]phenanthro[2,1-c]oxepine-9a-carboxylate

(3R,4R,5R,8R,9R,10R,13S,14R,15S)-4-(2-Carboxy-ethyl)-3-((S)-1-hydroxy-ethyl)-15-isopropyl-4,9,10-trimethyl-hexadecahydro-cyclopenta[a]phenanthrene-13-carboxylic acid methyl ester