4-Hydroxy-1-(1-piperidinyl)-1-cyclohexa-2,4-dienecarboxylic acid tert-butyl ester

4-(4-hydroxy-phenyl)-piperidine-1-carboxylic acid tert-butyl ester ; 1-piperidinecarboxylic acid, 4-(4-hydroxyphenyl)-, 1,1-dimethylethyl ester ; 1-boc-4-p-hydroxyphenylpiperidine ; tert-butyl 4-(4-hydroxyphenyl)piperidine-1-carboxylate ; 1-boc-4-hydroxyphenylpiperidine