for the following products
(2S,4R)-1-(tert-Butoxycarbonyl)-4-fluoro-2-pyrrolidinecarboxylic acid | 1-(1,1-Dimethylethyl) (2S,4R)-4-fluoro-1,2-pyrrolidinedicarboxylate | Boc-L-Pro(4-F)-OH (2S,4R) | N-Boc-(4S,2R)-4-fluoro-2-pyrrolidinecarboxylic acid | N-Boc-trans-4-Fluoro-L-proline and N-tert-Boc-trans-4-Fluoro-L-proline
