methyl (2S,4R)-4-(2-((1R,3R)-1-acetoxy-4-methyl-3-((2S,3S)-3-methyl-2-((R)-piperidine-2-carboxamido)pentanamido)pentyl)thiazole-4-carboxamido)-2-methyl-5-phenylpentanoate

4-({2-[1-acetoxy-3-(2-amino-3-methyl-pentanoylamino)-4-methyl-pentyl]-thiazole-4-carbonyl}-amino)-2-methyl-5-phenyl-pentanoic acid methyl ester

methyl 2-{(1R,3R)-1-acetoxy-3-[(tert-butoxycarbonyl)amino]-4-methylpentyl}-1,3-thiazole-4-carboxylate

(3R,5R)-tert-butyl 5-benzyl-3-methyl-2-oxopyrrolidine-1-carboxylate

(2S,4R)-methyl 4-((tert-butoxycarbonyl)amino)-2-methyl-5-phenylpentanoate

(R)-tert-butyl (2-methylhex-5-en-3-yl)carbamate

(2S,4R)-methyl 4-(2-((6S,9R,11R)-6-sec-butyl-9-isopropyl-2,2-dimethyl-4,7,13-trioxo-3,12-dioxa-5,8-diazatetradecan-11-yl)thiazole-4-carboxamido)-2-methyl-5-phenylpentanoate

(2S,4R)-4-((tert-butoxycarbonyl)amino)-2-methyl-5-phenylpentanoic acid

(S)-2-methyl N-((R)-2-methylhex-5-en-3-yl)propane-2-sulfinamide

methyl (2S,4R)-4-{[(2-{(1R,3R)-3-[(tert-butoxycarbonyl)amino]-1-hydroxy-4-methylpentyl}-1,3-thiazol-4-yl)carbonyl]amino}-2-methyl-5-phenylpentanoate

(R)-benzyl 2-((2S,3S)-1-((1R,3R)-1-acetoxy-1-(4-((2R,4S)-5-methoxy-4-methyl-5-oxo-1-phenylpentan-2-ylcarbamoyl)thiazol-2-yl)-4-methylpentan-3-ylamino)-3-methyl-1-oxopentan-2-ylcarbamoyl)piperidine-1-carboxylate

(2S,4R)-methyl 4-(2-((1R,3R)-1-acetoxy-3-(tert-butoxycarbonylamino)-4-methylpentyl)thiazole-4-carboxamido)-2-methyl-5-phenylpentanoate