9-[(4aR,6R,7R,8R,8aS)-8-((2R,3R,4S,5S,6R)-3-Acetoxy-4,5-bis-benzyloxy-6-benzyloxymethyl-tetrahydro-pyran-2-yloxy)-7-acetylamino-2-phenyl-hexahydro-pyrano[3,2-d][1,3]dioxin-6-yloxy]-nonanoic acid methyl ester 在
盐酸 、 sodium cyanoborohydride 作用下,
以
乙醚 为溶剂,
以77%的产率得到9-[(2R,3R,4R,5S,6R)-4-((2R,3R,4S,5S,6R)-3-Acetoxy-4,5-bis-benzyloxy-6-benzyloxymethyl-tetrahydro-pyran-2-yloxy)-3-acetylamino-6-benzyloxymethyl-5-hydroxy-tetrahydro-pyran-2-yloxy]-nonanoic acid methyl ester