InChI=1S/C16H16O8S/c1-22-13-7-10-6-11(8-23-16(10)15(18)14(13)17)9-2-4-12(5-3-9)24-25(19,20)21/h2-5,7,11,17-18H,6,8H2,1H3,(H,19,20,21)