methyl (3R,4R,5R,8S,9S)-9-hydroxy-2-methoxy-2-[(4R,5R)-5-methyl-6-phenyl-4-phenylmethoxyhexyl]-6-oxo-3,4-bis(phenylmethoxy)-9-(phenylmethoxymethyl)-1,7-dioxaspiro[4.4]nonane-8-carboxylate 在
lithium hydroxide 、
硫酸 作用下,
以
1,4-二氧六环 、
甲醇 为溶剂,
生成
6,7-bis-benzyloxy-4-benzyloxymethyl-1-(4-benzyloxy-5-methyl-6-phenyl-hexyl)-4-hydroxy-2,8-dioxa-bicyclo[3.2.1]octane-3,5-dicarboxylic acid di-tert-butyl ester