(E)-8-(3,4-Dimethoxystyryl)-1,3-dipropyl-2-thioxanthine 155814-29-2 1H-Purin-6-one, 1,2,3,7-tetrahydro-8-(2-(3,4-dimethoxyphenyl)ethenyl)-1,3-dipropyl-2-thioxo-,(E)-