piperidin-2-one 2-Piperidinone 2-Piperidone 27154-43-4 675-20-7 InChI=1/C5H9NO/c7-5-3-1-2-4-6-5/h1-4H2,(H,6,7 PIPERDINONE Piperidinone Piperidone AIDS124251 ZINC03860817 AIDS-124251 NCI60_001574 NSC18894 PIPERIDONE,2- 94570_FLUKA .alpha.-Piperidone .delta.-Valerolactam 5-Pentanolactam NSC2305 Pentanoic acid, 5-amino-, lactam Piperidon Valerolactim WLN: T6NVTJ V209_ALDRICH AI3-33342 DELTA-VALEROLACTAM EINECS 211-622-9 NSC 18894 NSC 2305 Piperidon [German] Piperidone-2 [French] alpha-Piperidone