(4aS,6aS,6bR,8aR,9R,10R,11R,12aR,12bR,14bS)-11-acetoxy-9-(acetoxymethyl)-10-hydroxy-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-octadecahydropicene-4a(2H)-carboxylic acid 在
sodium carbonate 作用下,
以
甲醇 、
乙醚 、
氯仿 为溶剂,
生成
2α,3β,23-trihydroxyolean-12-en-28-oic acid methyl ester