英文别名5-(5-(Ethoxycarbonyl)-4-methylthiazol-2-yl)-2-isobutoxybenzoic acid; 5-(5-Ethoxycarbonyl-4-methyl-1,3-thiazol-2-yl)-2-(2-methylpropoxy)benzoic acid; Febuxostat Impurity 55; Febuxostat Acid Ester Impurity; 5-Thiazolecarboxylic acid, 2-[3-carboxy-4-(2-methylpropoxy)phenyl]-4-methyl-, 5-ethyl ester 
