Acetic acid (2Z,6E)-3,7-dimethyl-9-((1S,4aS,8aS)-5,5,8a-trimethyl-2-methylene-decahydro-naphthalen-1-yl)-nona-2,6-dienyl ester 在
氟磺酸 作用下,
以
various solvent(s) 为溶剂,
反应 1.5h,
以56%的产率得到Acetic acid (1R,2S,4aS,4bR,6aS,10aS,10bR,12aS)-2-hydroxy-2,4b,7,7,10a,12a-hexamethyl-octadecahydro-chrysen-1-ylmethyl ester