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Ethyl thiophene-3-carboxylate THIOPHENE-2-ACETAMIDE Ethylthiophene-2-carboximidoatehydrochloride ETHYL THIOPHENE-2-GLYOXYLATE 2-Thiophenesulfonic acid 2,3-THIOPHENEDICARBOXALDEHYDE 3-THIOPHENECARBOXIMIDAMIDE HYDROCHLORIDE THIOPHENE-2-THIOCARBOXAMIDE 2-Thiopheneboronic acid 3,4-Diaminothiophene dihydrobromide