1(3H)-isobenzofuranone, 3-(3,5-dimethoxyphenyl)-5,7-dimethoxy- 3-(3,5-dimethoxyphenyl)-5,7-dimethoxy-2-benzofuran-1(3H)-one InChI=1/C18H18O6/c1-20-11-5-10(6-12(7-11)21-2)17-14-8-13(22-3)9-15(23-4)16(14)18(19)24-17/h5-9,17H,1-4H