1-Phenyl-1H,6H-1,2,4-triazolo(1',5':1,2)pyrimido(5,4-b)indol-5-one 1-Phenyl-6H-1,2,4-triazolo(1',5':1,2)-5-oxopyrimido(5,4-b)indole 116989-31-2 1H,6H-1,2,4-Triazolo(1',5':1,2)pyrimido(5,4-b)indol-5-one, 1-phenyl- 5H-(1,2,4)Triazolo(1',5':1,2)pyrimido(5,4-b)indol-5-one, 1,6-dihydro-1-phenyl-