(2Z)-4,7-dimethyl-2-(4-nitrobenzylidene)-1-benzofuran-3(2H)-one 3(2H)-benzofuranone, 4,7-dimethyl-2-[(4-nitrophenyl)methylene]-, (2Z)- InChI=1/C17H13NO4/c1-10-3-4-11(2)17-15(10)16(19)14(22-17)9-12-5-7-13(8-6-12)18(20)21/h3-9H,1-2H3/b14-9