{2R-[2α[2'R*, 5'R*(R*)],5β],[1(S*), 2R*, 11R*]}-3-{2-[(1,1-dimethylethyl)diphenylsilyloxy]-11-hydroxy-11-[octahydro-5'-(1-hydroxyundec-3-ynyl) [2.2'-bifuran]-5-yl]-6-undecen-8-ynyl}-5-methyl-2-(5H)-furanone