Acetic acid (2S,3S,4S,4aS,4bS,8aS,10aR)-4,10a-dihydroxy-2,4b,8,8-tetramethyl-2-vinyl-tetradecahydro-phenanthren-3-yl ester 在
吡啶 、
chromium(VI) oxide 、 lithium aluminium tetrahydride 作用下,
以
乙醚 为溶剂,
生成
(2S,3S,4R,4aS,4bS,8aS,10aR)-2,4b,8,8-Tetramethyl-2-vinyl-dodecahydro-phenanthrene-3,4,10a-triol