1,1',1''-(1,3,5-trimethyl-2,6,8-trioxabicyclo[3.2.1]oct-3-ene-4,7,7-triyl)triethanone InChI=1/C14H18O6/c1-7(15)11-8(2)18-13(6)14(9(3)16,10(4)17)20-12(11,5)19-13/h1-6H ethanone, 1,1',1''-(1,3,5-trimethyl-2,6,8-trioxabicyclo[3.2.1]oct-3-en-4-yl-7-ylidene)tris-