(E)-1,3-Diethyl-7-methyl-8-(4-phenylstyryl)xanthine (E)-8-(2-(1,1'-Biphenyl)-4-ylethenyl)-1,3-diethyl-7-methyl-3,7-dihydro-1H-purine-2,6-dione 155271-94-6 1H-Purine-2,6-dione, 3,7-dihydro-8-(2-(1,1'-biphenyl)-4-ylethenyl)-1,3-diethyl-7-methyl-, (E)-