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Methanol Thiophene-3,4-dicarboxylic acid 2-NITROTHIOPHENE-4-CARBOXYLIC ACID METHYL 3-AMINOTHIOPHENE-4-CARBOXYLATE HYDROCHLORIDE ETHYL 2-AMINO-5-ETHYLTHIOPHENE-3-CARBOXYLATE ETHYL 2-AMINO-4-METHYLTHIOPHENE-3-CARBOXYLATE DIETHYL 5-AMINO-3-METHYL-2,4-THIOPHENEDICARBOXYLATE 4-METHOXYTHIOPHENE-3-CARBOXYLIC ACID 2-Thiophenemethanol (5-BROMO-3-BENZO[B]THIENYL)METHANOL