Synonyms: cis-Phenyl-1 oxo-2 piperazinocarbonyl-4 p-ethoxyphenyl-5 pyrrolidine chlorhydrate hemihydrate;(4r,5s)-5-(4-ethoxyphenyl)-1-phenyl-4-(piperazin-1-ylcarbonyl)pyrrolidin-2-one hydrochloride(1:1);Piperazine, 1-((2-(4-ethoxyphenyl)-5-oxo-1-phenyl-3-pyrrolidinyl)carbonyl)-, hydrochloride, cis-, hydrate (2:2:1);AC1Q5KAA;KST-1A4983;AC1L5272;AR-1A6034;LS-112611;A827417;(4R,5S)-5-(4-ethoxyphenyl)-1-phenyl-4-(piperazine-1-carbonyl)pyrrolidin-2-one hydrochloride;(4R,5S)-5-(4-ethoxyphenyl)-1-phenyl-4-piperazin-1-ylcarbonyl-pyrrolidin-2-one hydrochloride;(4R,5S)-5-(4-ethoxyphenyl)-4-[oxo(1-piperazinyl)methyl]-1-phenyl-2-pyrrolidinone hydrochloride