InChI=1S/C16H12O10S/c1-25-16-12-8(4-10(18)14(16)20)13(19)7-2-6(5-26-27(22,23)24)3-9(17)11(7)15(12)21/h2-4,17-18,20H,5H2,1H3,(H,22,23,24)