InChI=1S/C12H10N2O8S/c13-2-6-5(1-7(15)16)10(12(21)22)23-11(6)14(3-8(17)18)4-9(19)20/h1,3-4H2,(H,15,16)(H,17,18)(H,19,20)(H,21,22)