(1S,2S,4aR,6aR,6bR,8aR,10S,12aR,12bR,14aR,14bR)-1,2,6a,6b,9,9,12a-heptamethyl-3,15-dioxoicosahydro-2,4a-(epoxymethano)phenanthro[2,1-f]chromen-10-yl acetate 在
吡啶 、
氢氧化钾 作用下,
反应 14.0h,
生成
(1R,2R,4aR,4bR,6aR,8S,10aR,10bR,12aR)-8-Acetoxy-2-hydroxy-1-((R)-2-hydroxy-2-methoxycarbonyl-1-methyl-propyl)-4a,4b,7,7,10a-pentamethyl-octadecahydro-chrysene-2-carboxylic acid methyl ester