InChI=1/C14H10N4O2S/c15-12(19)10-3-1-9(2-4-10)7-17-18-8-16-13-11(14(18)20)5-6-21-13/h1-8H,(H2,15,19)/b17-7+/f/h15H2 1D916F4F262E2569