InChI=1/C12H10N2O5S/c15-6-1-2-7(8(16)3-6)9(17)5-20-12-13-10(18)4-11(19)14-12/h1-4,15-16H,5H2,(H2,13,14,18,19)/p-1/fC12H9N2O5S/h13H/q-1 9F26EC02E937C6E8