65620-36-2 1H-Pyrazolo[3,4-b]pyridine-4-carboxylic acid,5-[[4-(diethylamino)-2,6-dimethylphenyl]methylene]-2-(2,5-disulfophenyl)-2,3,5,6-tetrahydro-3,6-dioxo-, 4-ethyl ester, disodium salt
65620-37-3 Benzenesulfonic acid,4-[1,3,6,7-tetrahydro-4-methyl-3,6-dioxo-5-[[1,2,3,6-tetrahydro-4-methyl-3,6-dioxo-2-(4-sulfophenyl)-5H-pyrazolo[3,4-b]pyridin-5-ylidene]methyl]-2H-pyrazolo[3,4-b]pyridin-5-yl]-, dipotassium salt