[(R)-1-[(S)-1-{3-[5-((R)-1-tert-Butoxycarbonylamino-2-hydroxy-ethyl)-2-methoxy-phenoxy]-5-methoxy-phenyl}-2-(2-methoxy-ethoxymethoxy)-ethylcarbamoyl]-2-(4-fluoro-3-nitro-phenyl)-ethyl]-carbamic acid 2-trimethylsilanyl-ethyl ester

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

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

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

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