3-oxo-6β-hydroxyolean-12-en-28-oic acid methyl ester 在
sodium tetrahydroborate 作用下,
以
甲醇 为溶剂,
反应 0.5h,
以40 mg的产率得到(4aS,6aR,6bR,8R,8aR,10S,12aR,12bR,14aS)-8,10-Dihydroxy-2,2,6a,6b,9,9,12a-heptamethyl-3,4,5,6,6a,6b,7,8,8a,9,10,11,12,12a,12b,13,14,14a-octadecahydro-2H-picene-4a-carboxylic acid methyl ester