InChI=1S/C15H12N4O4S/c20-10-3-1-2-7-8-4-17-15-19(13(8)18-12(7)10)9(6-24-15)14(23)16-5-11(21)22/h1-4,9,20H,5-6H2,(H,16,23)(H,21,22)