1H-Purine-2,6-dione, 8-((3,3-dimethylbutyl)thio)-3,7-dihydro-1,3-dimethyl- (9CI) 74039-73-9 NSC 81473 S-((3,3-Dimethylbutyl)thio)theophylline Theophylline, S-((3,3-dimethylbutyl)thio)-