InChI=1S/C16H16O9S/c17-10-4-1-7(24-10)5-8-2-3-9(26-8)6-23-16-13(20)11(18)12(19)14(25-16)15(21)22/h1-5,11-14,16,18-20H,6H2,(H,21,22)/b7-5+