1-Piperazinepropanoic acid, 8-methyl-8-azabicyclo(3.2.1)oct-3-yl ester, trihydrochloridehydrate, endo- 87168-50-1 endo-8-Methyl-8-azabicyclo(3.2.1)oct-3-yl-1-piperazinepropanoate trihydrochloride hydrate