1-Phenyl-3-piperidino-2-pyrrolidinone 1980-49-0 2-Pyrrolidinone, 1-phenyl-3-(1-piperidinyl)- 2-Pyrrolidinone, 1-phenyl-3-piperidino- 3-Piperidino-1-phenyl-2-pyrrolidinone 5-22-12-00470 (Beilstein Handbook Reference) BRN 0484465 Felipirina [INN-Spanish] Felipyrine Felipyrine [INN] Felipyrinum [INN-Latin]