(E)-1,3-Diethyl-8-(4-phenylstyryl)xanthine (E)-8-(2-(1,1'-Biphenyl)-4-ylethenyl)-1,3-diethyl-3,7-dihydro-1H-purine-2,6-dione 155271-93-5 1H-Purine-2,6-dione, 3,7-dihydro-8-(2-(1,1'-biphenyl)-4-ylethenyl)-1,3-diethyl-, (E)-