1,2,4-Triazin-3(2H)-one, 5-phenyl- (9CI) 15969-27-4 31952-61-1 5-Phenyl-1,2,4-triazin-3(2H)-one 5-Phenyl-as-triazin-3-ol as-Triazin-3(2H)-one, 5-phenyl- as-Triazin-3-ol, 5-phenyl-