1-Piperidinecarboxylic acid, 4-(4-carboxyphenyl)-, 1-(1,1-dimethylethyl) ester
1-(1,1-Dimethylethyl) 4-(4-carboxyphenyl)-1-piperidinecarboxylate
4-(4-Carboxyphenyl)piperidine-1-carboxylic acid tert-butyl ester
4-[1-(tert-Butoxycarbonyl)piperidin-4-yl]benzoic acid
N-Boc-4-(4-carboxyphenyl)piperidine