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