N-t-Boc-cis-4-Fluoro-L-prolinonitrile

(2S,4S)-1-Boc-2-cyano-4-fluoropyrrolidine

1-Boc-(2S,4S)-2-cyano-4-fluoropyrrolidine

(2S,4S)-tert-Butyl 2-cyano-4-fluoropyrrolidine-1-carboxylate