2-[(2-Hydroxy-4,5-dimethoxybenzoyl)amino]-4-thiazolecarboxylic acid ; 2-(2-Hydroxy-4,5-dimethoxybenzamido)-1,3-thiazole-4carboxylic Acid ; 2-(2-Hydroxy-4,5-dimethoxybenzamido)thiazole-4-carboxylic acid;2-(2-Hydroxy-4,5-dimethoxybenzamido)thiazole-4-carboxylic acid