1,8-Dimethyl-3-(2-methyl-1-butyl)xanthine 1H-Purine-2,6-dione, 3,7-dihydro-1,8-dimethyl-3-(2-methylbutyl)- 3,7-Dihydro-1,8-dimethyl-3-(2-methylbutyl)-1H-purine-2,6-dione 65029-11-0