InChI=1/C12H12N2O5S2/c1-3-19-6(15)4-20-12-13-9(16)7-5(2)8(11(17)18)21-10(7)14-12/h3-4H2,1-2H3,(H,17,18)(H,13,14,16)/p-2/fC12H10N2O5S2/q-2 540F7E93D07CE920