Acetic acid 2-{(1R,3aS,4S,5S,6aS)-5-formyl-1-hydroxy-4-[2-(5-methoxy-2-methyl-phenyl)-ethyl]-6a-methyl-octahydro-pentalen-1-yl}-2-oxo-ethyl ester 在
chromium(VI) oxide 、
硫酸 作用下,
以
丙酮 为溶剂,
生成
(1S,2S,3aS,4R,6aS)-4-(2-Acetoxy-acetyl)-4-hydroxy-1-[2-(5-methoxy-2-methyl-phenyl)-ethyl]-3a-methyl-octahydro-pentalene-2-carboxylic acid