"5H-Benzo[6,7]cyclohepta[1,2-c]pyridazine, 3-hydrazinyl-6,7-dihydro-"
"5H-Benzo[6,7]cyclohepta[1,2-c]pyridazine, 3-hydrazinyl-6,7-dihydro-"
"5H-Benzo[6,7]cyclohepta[1,2-c]pyridazine, 3-hydrazinyl-6,7-dihydro-"
3-hydrazono-3,5,6,7-tetrahydro-2H-benzo[6,7]cyclohepta[1,2-c]pyridazine