Synonyms: 10,23-Dioxabicyclo[17.3.1]tricosa-5,7,21-trien-9-one,3,13,15-trihydroxy-11-[2-hydroxy-1,3-dimethyl-5-(tetrahydro-4-methoxy-6-methyl-2H-pyran-2-yl)pentyl]-17-methoxy-6,12,16-trimethyl-,[1R-[1R*,3S*,5E,7E,11S*[1S*,2S*,3S*,5(2S*,4R*,6S*)],12S*,13R*,15S*,16S*,17S*,19S*]]-;Hemiswinholide A