Synonyms: 1,2-Pyrrolidinedicarboxylicacid, 4-methylene-, 1-(1,1-dimethylethyl) ester, (S)-;N-tert-Butoxycarbonyl-4-methylene-L-proline;1-(tert-butoxycarbonyl)-4-methylidene-L-proline;1,2-pyrrolidinedicarboxylic acid, 4-methylene-, 1-(1,1-dimethylethyl) ester, (2S)-;