SEARCH Articles Figures Tables 1,2,4-Benzotriazin 1.2.3- Benzotriazin-4 -ones 1.2.3- Benzotriazin-4 -ones tautomerism 2- Phenyl-l,2,4-benzotriazin-3 -one 3- Phenyl-1,2,4-benzotriazine 1 -oxide 3-Phenyl- -1-oxid 4- one 1-oxide L,2,3-Benzotriazin-4 One oxidation Phenyl oxide