18969-83-0 3-Fervenulone 6,8-Dimethyl-3-hydroxypyrimido(5,4-e)-as-triazine-5,7(6H,8H)-dione Fervenulone Pyrimido(5,4-e)-1,2,4-triazine-3,5,7(6H)-trione, 2,8-dihydro-6,8-dimethyl- (9CI)- Pyrimido(5,4-e)-as-triazine-5,7(6H,8H)-dione, 6,8-dimethyl-3-hydroxy-