1H-Purine-2,6-dione, 8-butyl-3,7-dihydro-1,3-dimethyl- (9CI) 35873-40-6 4-26-00-02478 (Beilstein Handbook Reference) 8-Butyl-3,7-dihydro-1,3-dimethyl-1H-purine-2,6-dione 8-Butyltheophylline BRN 0235783 NSC 14116 Theophylline, 8-butyl- Xanthine, 8-butyl-1,3-dimethyl-