1-((1-(4-Methoxyphenyl)-5-oxo-3-pyrrolidinyl)carbonyl)piperazine monohydrochloride 38160-05-3 Piperazine, 1-((1-(4-methoxyphenyl)-5-oxo-3-pyrrolidinyl)carbonyl)-, monohydrochloride p-Methoxyphenyl-1 oxo-2 piperazinocarbonyl-4 pyrrolidine chlorhydrate [French]