(Piperonyl-4 piperazinyl-1)-6 (dihydroxy-2,3 propyl)-9 purine dichlorhydrate [French] 37425-30-2 9-(2,3-Dihydroxypropyl)-6-(4-piperonyl-1-piperazinyl)-9H-purine dihydrochloride 9H-Purine, 9-(2,3-dihydroxypropyl)-6-(4-piperonyl-1-piperazinyl)-, dihydrochloride