129107-78-4 3-(2,3,6,7-Tetrahydro-1,3-dimethyl-2,6-dioxo-1H-purin-8-yl)benzenesulfonic acid 8-(3-Sulfophenyl)theophylline 8-(m-Sulfophenyl)theophylline Benzenesulfonic acid, 3-(2,3,6,7-tetrahydro-1,3-dimethyl-2,6-dioxo-1H-purin-8-yl)- MS0T