6-acetoxy-3β-hydroxy-7-oxo-14β,15β-epoxymeliac-1,5-diene-3-O-β-D-glucuronopyranoside 在
sodium hydroxide 、
硫酸 作用下,
以
甲醇 为溶剂,
反应 0.5h,
生成 (3S,8R,10R,13S,14R,15R,17S)-17-Furan-3-yl-3,6-dihydroxy-4,4,8,10,13-pentamethyl-3,8,9,10,11,12,13,15,16,17-decahydro-4H-20-oxa-cyclopropa[14,15]cyclopenta[a]phenanthren-7-one