1-Methyl-3-butylxanthine 1H-Purine-2,6-dione, 3,7-dihydro-3-butyl-1-methyl- 3,7-Dihydro-3-butyl-1-methyl-1H-purine-2,6-dione 31542-48-0 SC 2764 Xanthine, 3-butyl-1-methyl-