1-(3-Oxo-2,2,4-trimethylvaleryl)piperidine 5-20-03-00113 (Beilstein Handbook Reference) 73790-84-8 BRN 1243249 NSC 220114 Piperidine, 1-(2,2,4-trimethyl-1,3-dioxopentyl)- (9CI) Piperidine, 1-(3-oxo-2,2,4-trimethylvaleryl)-