(E)-1,3-Dipropyl-7-methyl-8-(2-phenylethenyl)-3,7-dihydro-1H-purine-2,6-dione (E)-7-Methyl-1,3-dipropyl-8-styrylxanthine 141807-86-5 1H-Purine-2,6-dione, 3,7-dihydro-1,3-dipropyl-7-methyl-8-(2-phenylethenyl)-, (E)-