InChI=1S/C16H12O10S/c1-24-7-4-11(18)13-12(5-7)25-6-9(14(13)19)8-2-3-10(17)16(15(8)20)26-27(21,22)23/h2-6,17-18,20H,1H3,(H,21,22,23)