InChI=1S/C19H15NO10S/c1-10(21)18(30-31(26,27)28)15(11-6-8-12(9-7-11)20(24)25)16-17(22)13-4-2-3-5-14(13)29-19(16)23/h2-9,15,18,22H,1H3,(H,26,27,28)