InChI=1S/C16H16O8S/c1-16(19)8-12-13(18)6-10(17)7-14(12)23-15(16)9-3-2-4-11(5-9)24-25(20,21)22/h2-7,15,17-19H,8H2,1H3,(H,20,21,22)/t15?,16-/m1/s1