p. 1759 - 1762
(2007/10/03)4-ethoxycarbonyl-4-(2-hydroxyethyl)piperidine-1-carboxylic acid tert-butyl ester
1-(1,1-dimethylethyl) 4-ethyl 4-(2-propenyl)-1,4-piperidinedicarboxylate
1-tert-butyl 4-ethyl piperidine-1,4-dicarboxylate
1,1-dimethylethyl 1-oxo-2-oxa-8-azaspiro[4,5]decane-8-carboxylate
4-ethoxycarbonylmethyl-piperidine-4-carboxylic acid; hydrochloride