[(3aR*,4R*,8bR*,E)-4-hydroxy-8,8-dimethyl-3-((((R*)-4-methyl-5-oxo-2,5-dihydrofuran-2-yl)oxy)methylene)-3,3a,4,5,6,7,8,8b-octahydro-2H-indeno[1,2-b]furan-2-one]
[(3aR*,4R*,8bR*,E)-4-hydroxy-8,8-dimethyl-3-((((R*)-4-methyl-5-oxo-2,5-dihydrofuran-2-yl)oxy)methylene)-3,3a,4,5,6,7,8,8b-octahydro-2H-indeno[1,2-b]furan-2-one]