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