InChI=1S/C17H16N2O9S/c1-26-17-19-13(23)8-6-3-2-5(4-7(6)18-14(8)29-17)27-16-11(22)9(20)10(21)12(28-16)15(24)25/h2-4,9-12,16,18,20-22H,1H3,(H,24,25)