(2Z)-2-(4-chlorobenzylidene)-4,7-dimethyl-1-benzofuran-3(2H)-one 3(2H)-benzofuranone, 2-[(4-chlorophenyl)methylene]-4,7-dimethyl-, (2Z)- InChI=1/C17H13ClO2/c1-10-3-4-11(2)17-15(10)16(19)14(20-17)9-12-5-7-13(18)8-6-12/h3-9H,1-2H3/b14-9