1-tert-Butyl 4-ethyl 3-oxo-1,4-piperidinedicarboxylate

3-oxo-piperidine-1,4-dicarboxylic acid 1-tert-butyl ester 4-ethyl ester ; ethyl 1-(tert-butoxycarbonyl)-3-oxopiperidine-4-carboxylate ; 1-tert-butyl 4-ethyl 3-hydroxy-5,6-dihydropyridine-1,4(2h)-dicarboxylate ; 1,4-piperidinedicarboxylic acid, 3-oxo-, 1-(1,1-dimethylethyl) 4-ethyl ester ; 3-oxo-piperidine-1-carboxylic acid tert-butyl este ; ethyl 1-n-boc-3-oxopiperidine-4-carboxylate ; 1-(tert-butoxycarbonyl)-4-ethyl-3-oxopiperidine-4-carboxylic acid ; ethyl n-boc-3-oxopiperidine-4-carboxylate ; 1-tert-butyl 4-ethyl 3-oxopiperidine-1,4-dicarboxylate