InChI=1/C14H14N4O4S/c1-7-12(23-14(15)17-7)13(19)18-16-5-8-3-9(20-2)11-10(4-8)21-6-22-11/h3-5H,6H2,1-2H3,(H2,15,17)(H,18,19)/b16-5+/f/h18H,15H2 876BF3F3FC6B3C3E