1,1'-Ethylene-2,2'-bipyridinium diiodide 25179-26-4 6,7-Dihydrodipyrido(1,2-a:2',1'-c)pyrazidinium diiodide (6CI) 6,7-Dihydrodipyrido(1,2-a:2',1'-c)pyrazidinium diiodide (7CI) 6,7-Dihydrodipyrido(1,2-a:2',1'-c)pyrazinediium diiodide DIPYRIDO(1,2-a:2',1'-c)PYRAZINEDIIUM, 6,7-DIHYDRO-, DIIODIDE Diquat diiodide