Abrisapogenol I methylester 在
sodium tetrahydroborate 作用下,
生成
、 (2R,4S,4aR,6aS,6bR,9S,10S,12aR)-4,10-Diacetoxy-9-acetoxymethyl-2,4a,6a,6b,9,12a-hexamethyl-1,2,3,4,4a,5,6,6a,6b,7,8,8a,9,10,11,12,12a,12b,13,14b-icosahydro-picene-2-carboxylic acid methyl ester