英文别名3-Methylisoxazole-4-carboxylic acid ethyl ester; 4-Isoxazolecarboxylicacid,3-methyl-,ethylester(8CI,9CI); Leflunomide Impurity 9; ETHYL 3-METHYL-1,2-OXAZOLE-4-CARBOXYLATE; 3-methyl-4-isoxazolecarboxylic acid ethyl ester; 4-Isoxazolecarboxylic acid, 3-methyl-, ethyl ester; ethyl 3-methyl-4-isoxazolecarboxylate; 3-Methyl-isoxazol-4-carbonsaeure-aethylester; 3-Methyl-5-oxypropionylisoxazole 
