11-oxabicyclo[8.2.1]tridec-1(13)-ene-6,12-dione, 5,9,9-trimethyl- 5,9,9-Trimethyl-11-oxa-bicyclo[8.2.1]tridec-1(13)-ene-6,12-dione 5,9,9-trimethyl-11-oxabicyclo[8.2.1]tridec-1(13)-ene-6,12-dione 8-Oxo-6,7,9,10-tetrahydrohumulen-1,12-olide InChI=1/C15H22O3/c1-10-5-4-6-11-9-13(18-14(11)17)15(2,3)8-7-12(10)16/h9-10,13H,4-8H2,1-3H