5-Oxo-D-proline 1,1-dimethylethyl ester

5-oxo-d-proline tert-butyl ester ; (r)-5-oxo-pyrrolidine-2-carboxylic acid tert-butyl ester ; 2-methyl-2-propanyl 5-oxo-d-prolinate ; d-pyroglutamic acid tert-butyl ester ; tert-butyl 5-oxo-d-prolinate ; d-pyroglutamic acid ter-butyl ester ; 5-oxo-d-proline1,1-dimethylethyl ester ; tert-butyl (r)-2-pyrrolidone-5-carboxylate ; (r)-tert-butyl 5-oxopyrrolidine-2-carboxylate ; tert-butyl (2r)-5-oxopyrrolidine-2-carboxylate