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