Synonyms: Benzenesulfonic acid, 2(or 5)-((4-amino-3-bromo-9,10-dihydro-9,10-dioxo-1-anthracenyl)amino)-5(or 2)-methyl-;2(Or 5)-((4-amino-3-bromo-9,10-dihydro-9,10-dioxo-1-anthryl)amino)-5(or 2)-methylbenzenesulphonic acid;2-[(4-amino-3-bromo-9,10-dioxo-9,10-dihydroanthracen-1-yl)amino]-6-methylbenzenesulfonic acid