1-piperidinecarboxylic acid, 4-hydroxy-, 1,1-dimethylethyl ester InChI=1/C10H19NO3/c1-10(2,3)14-9(13)11-6-4-8(12)5-7-11/h8,12H,4-7H2,1-3H tert-butyl 4-hydroxypiperidine-1-carboxylate