5-AMino-4-cyano-2-(Methoxycarbonyl)-3-thiopheneaceticAcidMethylEster;METHYL5-AMINO-4-CYANO-3-(2-METHOXY-Chemicalbook2-OXOETHYL)THIOPHENE-2-CARBOXYLATE;3-Thiopheneaceticacid,5-amino-4-cyano-2-(methoxycarbonyl)-,methylester