(phenylthio)methyl 2-oxo-7α,10aβ-dimethyl-8β-methoxy-4α-(1-methylethyl)-4,6,6aα,7,8,9,10,10a-octahydro-2H-naphtho<2,1-c>pyran-7β-carboxylate 在
三氟乙酸 作用下,
反应 0.25h,
以92%的产率得到2-oxo-7α,10aβ-dimethyl-8β-methoxy-4α-(1-methylethyl)-4,6,6aα,7,8,9,10,10a-octahydro-2H-naphtho<2,1-c>pyran-7β-carboxylic acid