(2Z)-2-(4-methoxybenzylidene)-4,7-dimethyl-1-benzofuran-3(2H)-one 3(2H)-benzofuranone, 2-[(4-methoxyphenyl)methylene]-4,7-dimethyl-, (2Z)- InChI=1/C18H16O3/c1-11-4-5-12(2)18-16(11)17(19)15(21-18)10-13-6-8-14(20-3)9-7-13/h4-10H,1-3H3/b15-10