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