132560-09-9 1H-Purine-2,6-dione, 3,7-dihydro-8-butyl-1-methyl-3-(2-methylpropyl)- 3,7-Dihydro-8-butyl-1-methyl-3-(2-methylpropyl)-1H-purine-2,6-dione BRN 4198165 Xanthine, 8-butyl-3-isobutyl-1-methyl-