InChI=1S/C16H14O10S/c1-24-14-3-7(2-11(20)16(14)26-27(21,22)23)12-6-10(19)15-9(18)4-8(17)5-13(15)25-12/h2-5,12,17-18,20H,6H2,1H3,(H,21,22,23)