1H-Purine-2,6-dione, 3,7-dihydro-1,3-dimethyl-7-(2-hydroxy-1-methylpropyl)- 3,7-Dihydro-1,3-dimethyl-7-(2-hydroxy-1-methylpropyl)-1H-purine-2,6-dione 41011-03-4 Theophylline, 7-(2-hydroxy-1-methylpropyl)- erythro-7-(alpha-Methyl-beta-hydroxypropyl)theophylline