InChI=1/C19H17NO7S2/c1-12(21)20-29(25,26)16-9-3-13(4-10-16)17-11-27-19(22)18(17)14-5-7-15(8-6-14)28(2,23)24/h3-10H,11H2,1-2H3,(H,20,21)/p-1/fC19H16NO7S2/q-1 6874A1386578F1C2