tert-Butyl 4-(3-ethoxy-3-oxopropanoyl)tetrahydro-1(2H)-pyridinecarboxylateEthyl 3-[1-(tert-butoxycarbonyl)piperidin-4-yl]-3-oxopropanoatetert-Butyl 4-(3-ethoxy-3-oxopropanoyl)piperidine-1-carboxylate1-(tert-Butoxycarbonyl)-4-(3-ethoxy-3-oxopropanoyl)piperidine4-(3-Ethoxy-3-oxopropanoyl)piperidine, N-BOC protectedTERT-BUTYL 4-(3-ETHOXY-3-OXOPROPANOYL)PIPERIDINE-1-CARBOXYLATE