1-Piperazinecarboxylic acid, 4-(2-(3,4-dihydro-2(1H)-isoquinolinyl)ethyl)-, ethyl ester, monohydrochloride 4-(2-(3,4-Dihydro-2(1H)-isoquinolinyl)ethyl)-1-piperazinecarboxylic acid ethyl ester HCl 64822-13-5