title: 1,2,3,6,7,8-Hexahydro-cinnolino[5,4,3-cde]cinnoline.
abstract: The title compound, C(12)H(12)N(4), was synthesized by the reaction of hydrazine hydrate and 9-methyl-3,4,6,7-tetra-hydro-2H-xanthene-1,8(5H,9H)-dione in ethanol. In the crystal, the mol-ecule lies across an inversion centre. The pyridazine rings are coplanar and the C(6) rings adopt envelope conformations.
authors.affiliation: College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, Chongqing, People's Republic of China.
authors.forename: Zhi-Qiang
authors.initials: ZQ
authors.lastname: Gao