(1S,3aR,5aR,5bR,7aR,9S,11aR,11bR,13aR,13bR)-1-(1-Hydroxy-ethyl)-3a-hydroxymethyl-5a,5b,8,8,11a-pentamethyl-icosahydro-cyclopenta[a]chrysene-1,9-diol 生成
(3aR,5aR,5bR,7aR,9S,11aR,11bR,13aR,13bS)-9-Hydroxy-3a-hydroxymethyl-5a,5b,8,8,11a-pentamethyl-icosahydro-cyclopenta[a]chrysen-1-one