1H-Purine-2,6-dione, 8-cyclobutyl-3,4-dihydro-1,3-dimethyl- (9CI) 35873-48-4 8-Cyclobutyl theophylline 8-Cyclobutyltheophylline BRN 1131917 NSC 101798 Theophylline, 8-cyclobutyl- Xanthine, 3-cyclobutyl-1,3-dimethyl-