2-(4-Piperonyl-1-piperazinyl)-9H-purine-9-ethanol dihydrochloride 24951-05-1 9-(2-Hydroxyethyl)-2-(4-piperonyl-1-piperazinyl)-9H-purine dihydrochloride 9H-Purine-9-ethanol, 2-(4-piperonyl-1-piperazinyl)-, dihydrochloride