InChI=1S/C16H12O11S/c17-5-7-2-1-6(3-9(7)27-28(23,24)25)16-15(22)14(21)11-10(26-16)4-8(18)12(19)13(11)20/h1-4,17-20,22H,5H2,(H,23,24,25)