InChI=1/C20H17N4O4S/c1-27-15-8-6-12(7-9-15)16-17-19(21)22-11-23-20(17)28-18(16)13-4-3-5-14(10-13)24-29(2,25)26/h3-11H,1-2H3,(H2,21,22,23)/q-1/f/h21H2 3B42B0DC94A560EA