2H-pyran-2-one, 6-[(1E)-1-heptenyl]-5,6-dihydro- 6-[(1E)-hept-1-en-1-yl]-5,6-dihydro-2H-pyran-2-one InChI=1/C12H18O2/c1-2-3-4-5-6-8-11-9-7-10-12(13)14-11/h6-8,10-11H,2-5,9H2,1H3/b8-6