1H-Purine-2,6-dione, 3,7-dihydro-1,3-dimethyl-7-(4-(4-(4-fluorophenyl)-1-piperazinyl)butyl)-, 7-(4-(4-(p-Fluorophenyl)-1-piperazinyl)butyl)theophylline, dihydrochloride 7-(4-(4-(p-Fluorophenyl)piperazinyl-(1))-n-butyl)-theophyllin dihydrochlorid [German] 81996-58-9 Theophylline, 7-(4-(4-(p-fluorophenyl)-1-piperazinyl)butyl)-, dihydrochloride