1,3-Dimethyl-8-methylthio-2-thioxouric acid 1784-69-6 2-Thio-8-methylthiotheophylline 6H-Purin-6-one, 1,2,3,7-tetrahydro-1,3-dimethyl-8-(methylthio)-2-thioxo- (9CI) NSC 95856 Theophylline, (8-methylthio)-2-thio- Theophylline, 8-methylthio-2-thio- Uric acid, 1,3-dimethyl-8-methylthio-2-thio-