71010-69-0 Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis(5-((4-amino-6-((4-sulfophenyl)amino)-1,3,5-triazin-2-yl)amino)-, N4,N4,N4',N4'-tetrakis(2-hydroxy-C2-3-alkyl) derivs, potassium sodium salts