1,4,7,9B-Tetraazaphenalene, dodecahydro- 10553-85-2 Dodecahydro-1,4,7,9b-tetraazaphenalene Dodecahydro-1,4,7,9b-tetrazaphenalin NSC81462 WLN: T666 1A M BNM GM KMTJ