Acetic acid (1R,3aS,5aR,5bR,7aR,9S,11aR,11bR,13aR,13bR)-9-methoxy-3a-methoxymethyl-5a,5b,8,8,11a-pentamethyl-13-oxo-icosahydro-cyclopenta[a]chrysen-1-ylmethyl ester 在
lithium aluminium tetrahydride 作用下,
以
四氢呋喃 为溶剂,
生成 (1R,3aS,5aR,5bR,7aR,9S,11aR,11bR,13S,13aR,13bR)-1-Hydroxymethyl-9-methoxy-3a-methoxymethyl-5a,5b,8,8,11a-pentamethyl-icosahydro-cyclopenta[a]chrysen-13-ol