1,3-Dimethyl-7-isobutyl-xanthine 1H-Purine-2,6-dione, 3,7-dihydro-1,3-dimethyl-7-(2-methylpropyl)- 3,7-Dihydro-1,3-dimethyl-7-(2-methylpropyl)-1H-purine-2,6-dione 7-Isobutyltheophylline 90162-60-0 Isbufilina [INN-Spanish] Isbufylline Isbufylline [INN] Isbufyllinum [INN-Latin] Theophylline, 7-isobutyl-