反式-桂皮酸酐 、
3-deoxy-27-hydroxyoleanolic acid 在
吡啶 作用下,
反应 72.0h,
以32%的产率得到(4aS,6aR,6bR,8aS,12aS,12bR,14bS)-2,2,6b,9,9,12a-Hexamethyl-6a-[(E)-(3-phenyl-acryloyl)oxymethyl]-1,3,4,5,6,6a,6b,7,8,8a,9,10,11,12,12a,12b,13,14b-octadecahydro-2H-picene-4a-carboxylic acid