1. 非布索坦杂质26(2-(3-羧基-4-异丁氧基苯基)-4-甲基噻唑-5-羧酸)

非布索坦杂质26(2-(3-羧基-4-异丁氧基苯基)-4-甲基噻唑-5-羧酸)

Febuxostat Impurity 26 (2-(3-carboxy-4-isobutyloxyphenyl)-4-methylthiazole-5-carboxylic acid)