Cryptophycin 1

(3S,6R,7S,8S)-3,7-Bis-(tert-butyl-dimethyl-silanyloxy)-9-((2E,7E)-(5S,6R)-5-hydroxy-6-methyl-8-phenyl-octa-2,7-dienoyloxy)-4,4,6,8-tetramethyl-5-oxo-nonanoic acid

(2E,7E)-(5S,6R)-6-Methyl-8-phenyl-5-triethylsilanyloxy-octa-2,7-dienoic acid

tert-butyl (2E,5S,6R,7E)-5-[(2S)-2-{[(2R)-3-({N-[(9H-fluoren-9-yl-methoxy)carbonyl]-D-phenylalanyl}amino)-2-methylpropanoyl]oxy}-4-methylpentanoyloxy]-6-methyl-8-phenylocta-2,7-dienoate

tert-butyl (2E,5S,6R,7E)-5-[(2S)-2-{[(2R)-3-({3-chloro-N-[(9H-fluoren-9-ylmethoxy)carbonyl]-O-methyl-D-tyrosyl}amino)-2-methylpropanoyl]oxy}-4-methylpentanoyloxy]-6-methyl-8-phenylocta-2,7-dienoate