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