Acetic acid (2S,4aR,4bS,6aS,7R,10aS,10bS)-8-((R)-4-acetylamino-3-methyl-butyl)-8-hydroxy-4a,6a,7-trimethyl-2,3,4,4a,4b,5,6,6a,6b,7,8,9a,10,10a,10b,11-hexadecahydro-1H-9-oxa-pentaleno[2,1-a]phenanthren-2-yl ester 在
sodium tetrahydroborate 作用下,
以
甲醇 为溶剂,
反应 0.33h,
生成
3β-Acetoxy-16β,22-dihydroxy-26-acetylaminocholest-5-ene