(4aS,4bS,7R,8R,8aS,10aS)-7-Hydroxy-4b,8,10a-trimethyl-1,3-dioxo-dodecahydro-2-oxa-phenanthrene-8-carboxylic acid methyl ester 在
sodium carbonate 作用下,
以
甲醇 为溶剂,
反应 1.5h,
生成 (1R,2R,4aS,5S,6S,8aS)-5-Carboxymethyl-2-hydroxy-1,4a,6-trimethyl-decahydro-naphthalene-1,6-dicarboxylic acid