ent-7-diethoxyphosphoryloxy-6-methoxy-3-oxo-10-trifluoroacetyl-galantham-1-ene-11α-carboxylic acid methyl ester 在
吡啶 、 sodium tetrahydroborate 作用下,
以
甲醇 为溶剂,
生成
ent-7-diethoxyphosphoryloxy-6-methoxy-3β-trifluoroacetoxy-10-trifluoroacetyl-galantham-1-ene-11α-carboxylic acid methyl ester