132560-19-1 1H-Purine-2,6-dione, 3,7-dihydro-7-(1,3-dioxolan-2-ylmethyl)-1-methyl-3-(2-methylpropyl)- BRN 4205600 Xanthine, 7-(1,3-dioxolan-2-ylmethyl)-1-methyl-3-isobutyl-