tert-butyl ((S)-1-(((S)-1-((2S,4R)-4-hydroxy-2-((4-(4-methylthiazol-5-yl)benzyl)carbamoyl)pyrrolidin-1-yl)-1-oxopropan-2-yl)amino)-4-methyl-1-oxopentan-2-yl)carbamate

tert-butyl (2S,4R)-4-hydroxy-2-([[4-(4-methyl-1,3-thiazol-5-yl)phenyl]methyl]carbamoyl)pyrrolidine-1-carboxylate

(2S,4R)-4-hydroxy-N-(4-(4-methylthiazol-5-yl)benzyl)pyrrolidine-2-carboxamide

tert-butyl N-[(2S)-1-[(2S,4R)-4-hydroxy-2-({4-(4-methylthiazol-5-yl)benzyl}carbamoyl)pyrrolidin-1-yl]-1-oxopropan-2-yl]carbamate

(2S,4R)-tert-butyl 2-(( 4-bromobenzyl)carbamoyl)-4-hydroxypyrrolidine-1-carboxylate