InChI=1S/C23H18N2O8/c26-9-12(10-27)11-1-3-13(4-2-11)24-14-5-7-16(28)20-18(14)22(30)19-15(25(32)33)6-8-17(29)21(19)23(20)31/h1-8,12,24,26-29H,9-10H2