Synonyms: Bryostatin1, 20-O-de(1-oxo-2,4-octadienyl)-20-O-(1-oxobutyl)-;18,27,28,29-Tetraoxatetracyclo[21.3.1.13,7.111,15]nonacosane, bryostatin 1deriv.; Bryostatin 9; Butanoic acid,25-(acetyloxy)-1,11,21-trihydroxy-17-(1-hydroxyethyl)-5,13-bis(2-methoxy-2-oxoethylidene)-10,10,26,26-tetramethyl-19-oxo-18,27,28,29-tetraoxatetracyclo[21.3.1.13,7.111,15]nonacos-8-en-12-ylester, [1S-[1R*,3R*,5Z,7S*,8E,11R*,12R*,13E,15R*,17S*(S*),21S*,23S*,25R*]]-