(3R)-7-heptyl-6-nitro-5-oxo-8-(3-trifluoromethyl-phenyl)-2,3-dihydro-5H-thiazolo[3,2-a]-pyridine-3-lithium carboxylate 在
Amberlite IR
120+ ion-exchange resin 作用下,
生成
(3R)-7-heptyl-6-nitro-5-oxo-8-(3-trifluoromethyl-phenyl)-2,3-dihydro-5H-thiazolo[3,2-a]-pyridine-3-carboxylic acid