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