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