(Piperonyl-4 piperazinyl-1)-6 (hydroxy-2 ethyl)-9 purine dichlorhydrate [French] 24932-79-4 6-(4-(3,4-Methylenedioxybenzyl)-1-piperazinyl)-9H-purine-9-ethanol dihydrochloride 9H-Purine-9-ethanol, 6-(4-piperonyl-1-piperazinyl)-, dihydrochloride