1H-Purine-2,6-dione, 3,7-dihydro-7-(5-(4-(4-chlorophenyl)-1-piperazinyl)pentyl)-1,3-dimethyl-, 7-(5-(4-(p-Chlorophenyl)-1-piperazinyl)pentyl)theophylline dihydrochloride 81996-52-3 Theophylline, 7-(5-(4-(p-chlorophenyl)-1-piperazinyl)pentyl)-, dihydrochloride