InChI=1/C13H12N2O4S/c16-11-5-20-10-2-1-6(3-9(10)15-11)14-12(17)7-4-8(7)13(18)19/h1-3,7-8H,4-5H2,(H,14,17)(H,15,16)(H,18,19)/p-1/t7-,8-/m1/s1/fC13H11N2O4S/h14-15H/q-1 3BA1AFBD73CF980D