Showing structure for (3ar,4r,6ar,9ar,9br)-9-methyl-3,6-dimethylidene-2-oxo-3ah,4h,5h,6ah,7h,9ah,9bh-azuleno[4,5-b]furan-4-yl (2e)-4-hydroxy-2-({[(2e)-2-(hydroxymethyl)but-2-enoyl]oxy}methyl)but-2-enoate