InChI=1S/C16H14O10S/c1-24-11-4-7(2-3-10(11)26-27(21,22)23)16-15(20)14(19)13-9(18)5-8(17)6-12(13)25-16/h2-6,15-18,20H,1H3,(H,21,22,23)