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