| 6-(4-piperonyl-1-piperazinyl)-9h-purine-9-ethano dihydrochloride |
| (piperonyl-4 piperazinyl-1)-6 (hydroxy-2 ethyl)-9 purine dichlorhydrate |
| 6-(4-(3,4-methylenedioxybenzyl)-1-piperazinyl)-9h-purine-9-ethanol dihydrochl |
| 6-(4-piperonyl-1-piperazinyl)-9h-purine-9-ethanodihydrochloride |
