4-26-00-01706 (Beilstein Handbook Reference) 5767-20-4 6H,13H-DIPYRIDAZINO(1,2-a:1',2'-d)-s-TETRAZINE, OCTAHYDRO- BRN 0003584 Octahydro-6H,13H-dipyridazine(1,2-a:1',2'-d)-s-tetrazine