InChI=1/C20H14NO4S2/c22-16-7-3-8-17-19(16)14-11-15(21-27(23,24)18-9-4-10-26-18)12-5-1-2-6-13(12)20(14)25-17/h1-2,4-6,9-11H,3,7-8H2/q-1 2E0519F2738C2CD5