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