(2S,3S)-ethyl 3-(1-(4-(4-fluorophenyl)thiazol-2-ylamino)-3-(1H-imidazol-4-yl)-1-oxopropan-2-ylcarbamoyl)oxirane-2-carboxylate

(2S,3S)-ethyl-3-(1-(6-fluorobenzo[d]thiazol-2-ylamino)-3-(1H-imidazol-4-yl)-1-oxopropan-2-yl-carbamoyl)oxirane-2-carboxylate

(2S,3S)-ethyl 3-((S)-1-oxo-1-(phenylamino)-3-(thiazol-4-yl)propan-2-ylcarbamoyl)oxirane-2-carboxylate

(2S,3S)-ethyl 3-((S)-1-(4-(4-fluorophenyl)thiazol-2-ylamino)-1-oxo-3-(thiazol-4-yl)propan-2-ylcarbamoyl)oxirane-2-carboxylate

(2S,3S)-ethyl 3-((S)-1-(4-(4-ethynylphenyl)thiazol-2-ylamino)-1-oxo-3-(thiazol-4-yl)propan-2-ylcarbamoyl)oxirane-2-carboxylate