1-(2-(4-Difenilmetil-piperazin-1-il)acetil)pirrolidin-2-one [Italian] 1-(Diphenylmethyl)-4-((2-oxo-1-pyrrolidinyl)acetyl)piperazine 109757-86-0 M.G. 16272 Piperazine, 1-(diphenylmethyl)-4-((2-oxo-1-pyrrolidinyl)acetyl)-