InChI=1S/C17H18O8S/c1-9(25-26(20,21)22)6-10-7-14(19)23-16-11-4-5-17(2,3)24-13(11)8-12(18)15(10)16/h4-5,7-9,18H,6H2,1-3H3,(H,20,21,22)