InChI=1S/C15H12O12S/c16-5-2-1-4(9(18)15(5)27-28(23,24)25)14-13(22)12(21)8-7(26-14)3-6(17)10(19)11(8)20/h1-3,13-14,16-20,22H,(H,23,24,25)