135257-48-6 2-Undecenoic acid, 7-(acetyloxy)-11-[8-(1-hydroxy-8-methoxy-2,6-dimethyl-8-oxo-2-octenyl)-4,10-dimethyl-1,7-dioxaspiro[5.5]-undec-2-yl]-2,6,10-trimethyl-8,11-bis(3-methyl-1-oxobutoxy)-5-(1-oxopropoxy)-, methyl ester AIDS-104964 AIDS104964 Didemnaketal B