(1R,3aS,5aR,5bR,7aR,9S,11aR,11bR,13aR,13bR)-1-((S)-1-Hydroxy-ethyl)-9-methoxy-3a-methoxymethyl-5a,5b,8,8,11a-pentamethyl-icosahydro-cyclopenta[a]chrysen-13-one 在
chromium(VI) oxide 、 lithium aluminium tetrahydride 、
硫酸 作用下,
以
四氢呋喃 、
丙酮 为溶剂,
生成 (1R,3aS,5aR,5bR,7aR,9S,11aR,11bR,13S,13aR,13bR)-1-((R)-1-Hydroxy-ethyl)-9-methoxy-3a-methoxymethyl-5a,5b,8,8,11a-pentamethyl-icosahydro-cyclopenta[a]chrysen-13-ol