N-tert-butoxycarbonylamino-O-(2-chloro-4-fluorobenzyl)-D-serine

(R)-2-Amino-3-(2-chloro-4-fluoro-benzyloxy)-N-[5-(4-chloro-phenyl)-3,3-dimethyl-1,1-dioxo-2,3-dihydro-1H-1λ6-isothiazol-4-ylmethyl]-N-ethyl-propionamide

((R)-2-(2-Chloro-4-fluoro-benzyloxy)-1-{[5-(4-chloro-phenyl)-3,3-dimethyl-1,1-dioxo-2,3-dihydro-1H-1λ6-isothiazol-4-ylmethyl]-ethyl-carbamoyl}-ethyl)-carbamic acid tert-butyl ester