4H-Pyran-4-one,2-[(1S,2S,3R,6R)-2-[(1E,3R)-1,3-dimethyl-4-oxo-1-hexen-1-yl]-1,3,5-trimethyl-7-oxabicyclo[4.1.0]hept-4-en-3-yl]-6-methoxy-3,5-dimethyl-