(Piperonyl-4 piperazinyl-1)-6 purine dichlorhydrate hemihydrate [French] 6-(4-(3,4-Methylenedioxybenzyl)-1-piperazinyl)-9H-purine dihydrochloride hemihydrate 69440-64-8 9H-Purine, 6-(4-piperonyl-1-piperazinyl)-, dihydrochloride, hemihydrate