1021-65-4 1H-Purine-2,6-dione, 3,7-dihydro-7-butyl-1,3-dimethyl- (9CI) 3,7-Dihydro-7-butyl-1,3-dimethyl-1H-purine-2,6-dione 4-26-00-02349 (Beilstein Handbook Reference) 7-Butyltheophylline BRN 0250158 Theophylline, 7-butyl-