1-(3-Aminopropyl)-4-(2-tolyl)piperazine dihydrochloride 1-Piperazinepropanamine, 4-(2-methylphenyl)-, dihydrochloride 4-(2-Methylphenyl)-1-piperazinepropanamine dihydrochloride 65876-32-6 VUFB-8785