乙酸酐 、
stylisterol A 在
吡啶 作用下,
反应 23.0h,
以95%的产率得到Acetic acid (3S,7S,8R,9R,10R,13R,14R,17R)-3-acetoxy-8-hydroxy-10,13-dimethyl-17-((E)-(R)-1,4,5-trimethyl-hex-2-enyl)-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-7-yl ester