Acetic acid (2S,4aR,4bS,7S,8S,8aR)-8-(2-hydrazono-ethyl)-4a,7-dimethyl-7-prop-1-ynyl-1,2,3,4,4a,4b,5,6,7,8,8a,9-dodecahydro-phenanthren-2-yl ester 在
potassium tert-butylate 作用下,
以
二甲基亚砜 为溶剂,
生成
(2S,4aR,4bS,7S,8S,8aS)-8-Ethyl-4a,7-dimethyl-7-prop-1-ynyl-1,2,3,4,4a,4b,5,6,7,8,8a,9-dodecahydro-phenanthren-2-ol