80761-64-4 ISONICOTINIC ACID, 2-(6,8-DIOXO-5,6,7,8-TETRAHYDROPYRIMIDO(4,5-e)-as-TRIAZIN-3-Y Isonicotinic acid, 2-(6,8-dioxo-5,6,7,8-tetrahydropyrimido(4,5-e)-as-triazin-3-yl)hydrazide, dihydrate Pyrimido(4,5-e)-as-triazine-6(5H),8(7H)-dione, 3-isonicotinoylhydrazino-, dihydrate