ethyl 2-bromo-6-formyl-4H-thieno[3,2-b]pyrrole-5-carboxylate
2-bromo-4-methyl-4H-thieno[2',3':4,5]pyrrolo[2,3-d]pyridazin-5(6H)-one
ethyl 2-bromo-6-formyl-4-methyl-4H-thieno[3,2-b]pyrrole-5-carboxylate
2-bromo-4H-thieno[3,2-b]pyrrole-5-carboxylic acid