tert-butyl (2S)-2-{[(2S)-3-hydroxy-1-methoxy-1-oxopropan-2-yl]carbamoyl}pyrrolidine-1-carboxylate

2-((S)-1-(2-((S)-pyrrolidin-2-yl)oxazole-4-carbonyl)pyrrolidin-2-yl)oxazole-4-carboxamide

2-((S)-1-(2-((S)-1-amino-2-(4-hydroxyphenyl)ethyl)oxazole-4-carbonyl)pyrrolidin-2-yl)oxazole-4-carboxamide

methyl (R)-2-((S)-1-(tert-butoxycarbonyl)pyrrolidin-2-yl)-4,5-dihydrooxazole-4-carboxylate

Boc-Pro-Dha-OMe

N-((S)-1-(4-carbamoyloxazol-2-yl)-2-(4-hydroxyphenyl)ethyl)-2-((S)-pyrrolidin-2-yl)oxazole-4-carboxamide

N-Boc-L-Pro(C=S)-L-(OTBS)Ser methyl ester

2-((S)-1-(2-((S)-1-amino-2-methylpropyl)oxazole-4-carbonyl)pyrrolidin-2-yl)oxazole-4-carboxamide

2-((S)-1-(2-((S)-1-amino-3-methylbutyl)oxazole-4-carbonyl)pyrrolidin-2-yl)oxazole-4-carboxamide

2-((S)-1-(2-((S)-1-amino-2-phenylethyl)oxazole-4-carbonyl)pyrrolidin-2-yl)oxazole-4-carboxamide

(S)-1-(L-threonyl-L-prolyl)-N-((S)-1-amino-3-hydroxy-1-oxopropan-2-yl)pyrrolidine-2-carboxamide

N-((S)-1-(4-carbamoyloxazol-2-yl)-2-phenylethyl)-2-((S)-pyrrolidin-2-yl)oxazole-4-carboxamide

(S)-1-(L-seryl-L-prolyl)-N-((S)-1-amino-3-hydroxy-1-oxopropan-2-yl)pyrrolidine-2-carboxamide