(2S)-2-[(3'-{[(tert-butoxy)carbonyl]amino}propionyl)oxy]-4-methylpentanoic acid

(2S,1''S,2''R,1''''R)-1''-[3'''-({1''''-[(tert-butoxy)carbonyl]-2''''-(p-methoxyphenyl)ethyl}carbamoyl)allyl]-2''-methyl-4''-phenylbut-3''-enyl 2-[(3'-{[(tert-butoxy)carbonyl]amino}propionyl)oxy]-4-methylpentanoate

(S)-2-(3-tert-Butoxycarbonylamino-propionyloxy)-4-methyl-pentanoic acid (E)-(1S,2R)-1-{(E)-3-[(R)-2-(4-methoxy-phenyl)-1-(2-trimethylsilanyl-ethoxycarbonyl)-ethylcarbamoyl]-allyl}-2-methyl-4-phenyl-but-3-enyl ester

3-tert-Butoxycarbonylamino-propionic acid (S)-1-[(E)-(1S,2R)-1-(2-methoxymethoxy-ethyl)-2-methyl-4-phenyl-but-3-enylcarbamoyl]-3-methyl-butyl ester