InChI=1S/C16H14O9S/c17-7-10-11(18)5-14-15(16(10)20)12(19)6-13(24-14)8-1-3-9(4-2-8)25-26(21,22)23/h1-5,13,17-18,20H,6-7H2,(H,21,22,23)