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