Benzoic acid (S)-((4R,4aS,8aR,9R,9aR,10aR)-9-methoxy-7,7-dimethyl-hexahydro-1,3,6,8,10-pentaoxa-anthracen-4-ylcarbamoyl)-((2R,5R,6R)-2-methoxy-5,6-dimethyl-4-methylene-tetrahydro-pyran-2-yl)-methyl ester 在
lithium hydroxide 作用下,
以
甲醇 为溶剂,
生成 (2S)-2-hydroxy-2-[(2R,5R,6R)-2-methoxy-5,6-dimethyl-4-methylideneoxan-2-yl]-N-[(1R,3S,4R,8R,9R,10R)-9-methoxy-12,12-dimethyl-2,5,7,11,13-pentaoxatricyclo[8.4.0.03,8]tetradecan-4-yl]acetamide