InChI=1S/C17H20O10S/c1-4-11(26-28(21,22)23)9-6-14(19)24-12-7-10(18)8-5-13(17(2,3)27-20)25-16(8)15(9)12/h6-7,11,13,18,20H,4-5H2,1-3H3,(H,21,22,23)