[(R)-2-Benzyloxy-1-(3-{3-[(S)-2-hydroxy-1-(2,2,2-trifluoro-acetylamino)-ethyl]-5-methoxy-phenoxy}-4-methoxy-phenyl)-ethyl]-carbamic acid tert-butyl ester

{(R)-2-Benzyloxy-1-[3-(3-{(S)-1-[(R)-2-tert-butoxycarbonylamino-3-(4-fluoro-3-nitro-phenyl)-propionylamino]-2-hydroxy-ethyl}-5-methoxy-phenoxy)-4-methoxy-phenyl]-ethyl}-carbamic acid tert-butyl ester

(S)-{3-[5-((R)-2-Benzyloxy-1-tert-butoxycarbonylamino-ethyl)-2-methoxy-phenoxy]-5-methoxy-phenyl}-[(R)-2-tert-butoxycarbonylamino-3-(4-fluoro-3-nitro-phenyl)-propionylamino]-acetic acid

{(R)-2-Benzyloxy-1-[3-(3-{(S)-1-[(R)-3-(4-fluoro-3-nitro-phenyl)-2-(2,2,2-trichloro-ethoxycarbonylamino)-propionylamino]-2-hydroxy-ethyl}-5-methoxy-phenoxy)-4-methoxy-phenyl]-ethyl}-carbamic acid tert-butyl ester

[(R)-1-((S)-1-{3-[5-((R)-2-Benzyloxy-1-tert-butoxycarbonylamino-ethyl)-2-methoxy-phenoxy]-5-methoxy-phenyl}-2-hydroxy-ethylcarbamoyl)-2-(4-fluoro-3-nitro-phenyl)-ethyl]-carbamic acid 2,2,2-trichloro-1,1-dimethyl-ethyl ester