2-{(1S,2R)-2-Hydroxy-1-[(2-phenyl-thiazole-4-carbonyl)-amino]-propyl}-thiazole-4-carboxylic acid

(4S,5R)-4-[(1S,2R)-1-(4-Ethoxycarbonyl-thiazol-2-yl)-2-hydroxy-propylcarbamoyl]-2,2,5-trimethyl-oxazolidine-3-carboxylic acid tert-butyl ester