Synonyms: 1,3-dimethyl-1H-imidazo[4,5-b]quinoxalinium toluene-p-sulphonate;1H-Imidazo(4,5-B)quinoxalinium, 1,3-dimethyl-, 4-methylbenzenesulfonate (1:1);1H-Imidazo(4,5-B)quinoxalinium, 1,3-dimethyl-, salt with 4-methylbenzenesulfonic acid (1:1);Einecs 267-595-9