InChI=1/C13H14N4O4S/c1-8(9-2-4-10(5-3-9)17(20)21)15-16-13-14-12(19)11(22-13)6-7-18/h2-5,11,18H,6-7H2,1H3,(H,14,16,19)/b15-8+/t11-/m1/s1/f/h14H/b15-8+,16-13+ C775B93699C112B7