6-oxabicyclo[3.2.2]non-3-en-7-one, 2,2,5-trimethyl-, (1S,5R)- InChI=1/C11H16O2/c1-10(2)6-7-11(3)5-4-8(10)9(12)13-11/h6-8H,4-5H2,1-3H3/t8-,11-/m1/s rel-(1R,5S)-2,2,5-trimethyl-6-oxabicyclo[3.2.2]non-3-en-7-one