Z-Pro-OH
(2S,4S)-1-((Benzyloxy)carbonyl)-4-hydroxypyrrolidine-2-carboxylic acid
Z-Hyp(Tbu)-OH
Z-DL-Pro-OH
((Benzyloxy)carbonyl)-D-proline
(2S,4R)-4-Hydroxy-1-(((4-nitrobenzyl)oxy)carbonyl)pyrrolidine-2-carboxylic acid
(2S,4R)-1-((Benzyloxy)carbonyl)-4-hydroxypyrrolidine-2-carboxylic acid
