InChI=1S/C16H14O8S/c1-10(9-23-25(18,19)20)4-6-22-16-14-12(5-7-21-14)8-11-2-3-13(17)24-15(11)16/h2-5,7-8H,6,9H2,1H3,(H,18,19,20)/b10-4+