4-((9,10-Dihydro-4-(methylamino)-9,10-dioxo-1-anthryl)amino)toluene-3-sulphonic acid 67893-47-4 Benzenesulfonic acid, 2-((9,10-dihydro-4-(methylamino)-9,10-dioxo-1-anthracenyl)amino)-5-methyl- EINECS 267-621-9 m-Toluenesulfonic acid, 6-((4-(methylamino)-1-anthraquinonyl)amino)-