(S)-2-{3-[(R)-2-[2-(Diethoxy-phosphoryl)-acetylamino]-3-(4-methoxy-phenyl)-propionylamino]-propionyloxy}-4-methyl-pentanoic acid (E)-(1S,2R)-2-methyl-1-(2-oxo-ethyl)-4-phenyl-but-3-enyl ester

(S)-2-{3-[(R)-2-[2-(Diethoxy-phosphoryl)-acetylamino]-3-(4-methoxy-phenyl)-propionylamino]-propionyloxy}-4-methyl-pentanoic acid (E)-(1S,2R)-1-[2-(tert-butyl-diphenyl-silanyloxy)-ethyl]-2-methyl-4-phenyl-but-3-enyl ester