InChI=1S/C12H8O4.C11H6O3/c1-14-12-7-2-3-11(13)16-10(7)6-9-8(12)4-5-15-9;12-11-2-1-7-5-8-3-4-13-9(8)6-10(7)14-11/h2-6H,1H3;1-6H