重氮甲烷 、
11α-hydroperoxy-diacetyl hederagenin 以
乙醚 为溶剂,
以95%的产率得到(4aS,6aS,6bR,8aR,9R,10S,12aS,12bR,13R,14bS)-10-Acetoxy-9-acetoxymethyl-13-hydroperoxy-2,2,6a,6b,9,12a-hexamethyl-1,3,4,5,6,6a,6b,7,8,8a,9,10,11,12,12a,12b,13,14b-octadecahydro-2H-picene-4a-carboxylic acid methyl ester