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