SEARCH Articles Figures Tables 2- quinoxaline oxidation 4- one 1-oxide Benzimidazol 4-oxid Benzimidazol-2-ones Benzimidazole 3-oxide Benzimidazole 3-oxides benzimidazol-2-ones Benzimidazole oxidation Benzimidazoles benzimidazol-2-ones Di- oxide N -ones One oxidation Quinoxalin-2-ones Quinoxalin-3-one 1-oxides Quinoxaline N-oxides Quinoxalines N-oxidation