Acetic acid (6E,10Z)-(3R,3aS,4R,8R,12aR)-3,4-dihydroxy-10-hydroxymethyl-3-isopropyl-6,12a-dimethyl-1,2,3,3a,4,5,8,9,12,12a-decahydro-cyclopentacycloundecen-8-yl ester 在
4-二甲氨基吡啶 、 lithium aluminium tetrahydride 、
对甲苯磺酸 、
三乙胺 作用下,
生成
(3E,7Z)-(1R,5R,10R,13R,17S)-7-(tert-Butyl-dimethyl-silanyloxymethyl)-13-isopropyl-3,10,15,15-tetramethyl-14,16-dioxa-tricyclo[8.6.1.013,17]heptadeca-3,7-dien-5-ol