InChI=1S/C17H18O8S/c1-2-9-3-4-10(5-15(9)25-26(21,22)23)17-14(20)8-12-13(19)6-11(18)7-16(12)24-17/h3-7,14,17-20H,2,8H2,1H3,(H,21,22,23)