Pentifyllin Pentoxifyllin Xantinolnicotinat Diprophyllin 3,7-Dihydro-7-(2-hydroxyethyl)-1,3-dimethyl-1H-purin-2,6-dion 3,7-Dihydro-7-(2-hydroxypropyl)-1,3-dimethyl-1H-purin-2,6-dion 7-(2-Chlorethyl)-1,3-dimethyl-(1H,3H)-purin-2,6-dion Theophyllin-7-ylessigsure