(S)-2-[(2S,4S,5S,6S)-6-[(3E,7E,9E)-(2S,6R)-10-Bromo-6-(tert-butyl-dimethyl-silanyloxy)-2-methoxy-4-methyl-deca-3,7,9-trienyl]-4-(tert-butyl-dimethyl-silanyloxy)-2-methoxy-5-methyl-tetrahydro-pyran-2-yl]-propionic acid

3'-tert-butyldimethylsilyloxy-dolastatin 19

6-[10-bromo-6-(tert-butyldimethylsilyloxy)-2-methoxy-4-methyl-deca-3,7,9-trienyl]-4-(tert-butyldimethylsilyloxy)-2-[2-(3,4-dimethoxybenzyloxy)-1-methyl-ethyl]-2-methoxy-5-methyl-tetrahydro-pyran

(2R,5S,6R,7S,9S,10E,13R,14E,16E)-13-(tert-butyldimethylsilyloxy)-1-(3,4-dimethoxybenzyloxy)-17-bromo-5-hydroxy-9-methoxy-7-triethylsilyloxy-2,6,11-trimethyl-heptadeca-10,14,16-trien-3-one