1,3-Dipropyl-7-methyl-8-(3,4-dimethoxystyryl)xanthine 152881-18-0 1H-Purine-2,6-dione, 8-(3,4-dimethoxyphenyl)-3,7-dihydro-7-methyl-1,3-dipropyl- 8-(3,4-Dimethoxyphenyl)-3,7-dihydro-7-methyl-1,3-dipropyl-1H-purine-2,6-dione KF 17837 KF 17837S KF-17837