InChI=1/C11H9N4O5S/c1-20-9(16)2-6-5-21-11(13-6)14-10(17)8-3-7(4-12-8)15(18)19/h3-5H,2H2,1H3,(H-,12,13,14,17)/q-1/f/h17H 44549892D1CB6691