135257-49-7 2-Undecenoic acid, 7-(acetyloxy)-11-[8-(1-hydroxy-2-oxopropyl)-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-104963 AIDS104963 Didemnaketal A