InChI=1S/C17H12N2O8S/c20-12-3-1-2-10-14(12)9-6-11(17(21)22)19-16(15(9)18-10)13-5-4-8(27-13)7-26-28(23,24)25/h1-6,18,20H,7H2,(H,21,22)(H,23,24,25)