4-Benzo[1,3]dioxol-5-ylmethyl-3-(3,4,5-trimethoxy-benzylidene)-dihydro-furan-2-one InChI=1/C22H22O7/c1-24-19-9-14(10-20(25-2)21(19)26-3)7-16-15(11-27-22(16)23)6-13-4-5-17-18(8-13)29-12-28-17/h4-5,7-10,15H,6,11-12H2,1-3H3/b16-7-/t15-/m0/s Isochaihulactone