乙酸酐 、
2α,3β,11α,14-tetrahydroxy-5β,14β-card-20(22)-enolide 以
吡啶 为溶剂,
反应 24.0h,
生成 [(2R,3R,5R,8R,9S,10S,11R,13R,14S,17R)-2,11-diacetyloxy-14-hydroxy-10,13-dimethyl-17-(5-oxo-2H-furan-3-yl)-1,2,3,4,5,6,7,8,9,11,12,15,16,17-tetradecahydrocyclopenta[a]phenanthren-3-yl] acetate