InChI=1S/C16H12O11S/c1-25-11-5-10-12(15(21)14(11)20)8(18)4-9(26-10)6-2-3-7(17)16(13(6)19)27-28(22,23)24/h2-5,17,19-21H,1H3,(H,22,23,24)