72894-33-8 Benzenesulfonamide, 3(or 4)-((4-((2,6-dimethylphenyl)amino)-9,10-dihydro-9,10-dioxo-1-anthracenyl)amino)-2,4(or 3,5)-dimethyl-, bis(((2-(sulfooxy)ethyl)amino)sulfonyl) deriv, potassium sodium salt