Thiophene-2-carbohydrazide, 2-Thiophenecarboxylic acid, hydrazide, 2-thiophenecarbohydrazide, 2-Thiophenecarboxylic hydrazide, Thiophene-2-carboxylic hydrazide, Thiophene-2-carboxylic acid hydrazide, 2-Thiophenecarboxylic acid hydrazide, 2-Thiophenecarbohydrazonic acid, 2-thiophenecarboxcylic acid hydrazine, 2-Thenoylhydrazine