(5S)-1-[(2S)-O-(N,N-DIMETHYL-VAL-VAL-N-ME-VAL-PRO-PRO)-2-HYDROXYISOVALERYL]-2-OXO-4-METHOXY-5-BENZYL-3-PYRROLINE;(5S)-1-[(2S)-O-(N,N-Val-Val-N-Me-Val-Pro-Pro)-2-hydroxyisovaleryl]-2-oxo-4-methoxy-5-benzyl-3-pyrroline;(5S)-1-{(2S)-O-[(N,N-dimethyl-L-valyl)-L-valyl-(N-methyl-L-valyl)-L-prolyl-L-prolyl]-2-hydroxy-isovaleryl}-2-oxo-4-methoxy-5-benzyl-3-pyrroline;(5S)-1-[N,N-Dimethyl-L-Val-L-Val-N-methyl-L-Val-L-Pro-L-Pro-L-Hyiv-]-5-benzyl-4-methoxy-1H-pyrrol-2(5H)-one;L-Proline,1-(1-(N-(N-(N,N-dimethyl-L-valyl)-L-valyl)-N-methyl-L-valyl)-L-propyl)-,1-((2,5-dihydro-3-methoxy-5-oxo-2-(phenylmethyl)-1H-pyrrol-1-yl)carbonyl)-2-methylpropyl ester,(S-(R*,R*));dolastatin-15;L-Proline,1-(1-(N-(N-(N,N-dimethyl-L-valyl)-L-valyl)-N-methyl-L-valyl)-L-prolyl)-,1-((2,5-dihydro-3-methoxy-5-oxo-2-(phenylmethyl)-1H-pyrrol-1-yl)carbonyl)-2-methylpropyl ester,(S-(R*,R*))
-20°C