在
palladium on activated charcoal
甲醇 、
氢气 、
sodium methylate 作用下,
生成 (1S,2S,4S,5R)-4-[(2R,3R,4R,5R,6R)-3-Acetylamino-5-hydroxy-6-hydroxymethyl-4-((2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-hydroxymethyl-tetrahydro-pyran-2-yloxy)-tetrahydro-pyran-2-yloxy]-5-carboxymethoxy-cyclohexane-1,2-dicarboxylic acid di-tert-butyl ester