Synonyms: [1]Benzothieno[2,3-d]pyrimidin-4(1H)-one, 5,6,7,8-tetrahydro-,hydrazone (9CI);(5,6,7,8-Tetrahydro-benzo[4,5]thieno[2,3-d]pyrimidin-4-yl)-hydrazine;4-hydrazinyl-5,6,7,8-tetrahydro[1]benzothieno[2,3-d]pyrimidine;4-hydrazinyl-5,6,7,8-tetrahydrobenzo[4,5]thieno[2,3-d]pyrimidine;5,6,7,8-tetrahydrobenzo[4,5]thieno[2,3-d]pyrimidin-4-ylhydrazine;5,6,7,8-tetrahydrobenzo[b]thiopheno[2,3-d]pyrimidine-4-ylhydrazine;