Showing structure for methyl (3as,4s,5s,10r,11r,11as)-11-hydroxy-4-{[(2z)-2-(hydroxymethyl)but-2-enoyl]oxy}-5-[(2s)-2-methylbutoxy]-3-methylidene-2-oxo-4,5,8,9,11,11a-hexahydro-3ah-spiro[cyclodeca[b]furan-10,2'-oxirane]-6-carboxylate