(E)-8-(3-chlorostyryl)-1,3,7-trimethylxanthine;(E)-1,3-Diethyl-8-(2-(3,4-dimethoxyphenyl)ethenyl)-3,7-dihydro-1H-purine-2,6-dione;(E)-8-[2-(3,4-dimethoxyphenyl)vinyl]-1,3-diethyl-3,7-dihydropurine-2,6-dione;1H-Purine-2,6-dione,3,7-dihydro-1,3-diethyl-8-(2-(3,4-dimethoxyphenyl)ethenyl)-,(E);8-(3-Chlorostyryl)caffeine;(E)-8-(3,4-dimethoxystyryl)-1,3-diethyl-1H-purine-2,6(3H,7H)-dione;(E)-1,3,7-trimethyl-8-(3-chlorostyryl)xanthine;(E)-8-(3,4-Dimethoxystyryl)-1,3-diethylxanthine;8-[(E)-2-(3-Chlorophenyl)vinyl]-1,3,7-trimethyl-3,7-dihydro-1H-pu rine-2,6-dione;8-(3-chloro-(E)-styryl)caffeine;(E)-8-(3-chlorostyryl)-1,3,7-trimethyl-3,7-dihydro-1H-purine-2,6-dione