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

cryptophycin 53

3-(diethoxyphosphinyl)-N-(3-chloro-4-methoxyphenyl)-D-alanine tert-butyl ester

(S)-2-(3-Amino-2,2-dimethyl-propionyloxy)-4-methyl-pentanoic acid (E)-(1S,2R)-1-{(E)-3-[(R)-1-carboxy-2-(3-chloro-4-methoxy-phenyl)-ethylcarbamoyl]-allyl}-2-methyl-4-phenyl-but-3-enyl ester

(2S)-2-(3-tert-butoxycarbonylamino-2,2-dimethyl-propionyloxy)-4-methyl-pentanoic acid (1S,2R,2E)-1-{3-[1-tert-butoxycarbonyl-(2R)-2-(3-chloro-4-methoxyphenyl)ethylcarbamoyl]allyl}-2-methyl-4-phenyl-but-(3E)-enyl ester