[(4S,4aR,5S,8S,8aR)-8-hydroxy-3,4a,5-trimethyl-9-oxo-4,5,6,7,8,8a-hexahydrobenzo[f][1]benzofuran-4-yl] acetate 在
chromium(VI) oxide 、
硫酸 、
silica gel 作用下,
以
丙酮 为溶剂,
生成 Acetic acid (4S,4aR,5S)-8-hydroxy-3,4a,5-trimethyl-9-oxo-4,4a,5,6,7,9-hexahydro-naphtho[2,3-b]furan-4-yl ester