(3aR,5R,6R,9aR,9bS)-5-Hydroxy-6,9a-dimethyl-3,9-dioxo-dodecahydro-naphtho[1,2-c]furan-6-carboxylic acid methyl ester 在
chromium(VI) oxide 、
硫酸 作用下,
以
丙酮 为溶剂,
反应 0.03h,
以80%的产率得到(3aR,6R,9aR,9bS)-6,9a-Dimethyl-3,5,9-trioxo-dodecahydro-naphtho[1,2-c]furan-6-carboxylic acid methyl ester