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