InChI=1S/C15H22O6S/c1-4-10-13(17)5-12-9(3)14(21-22(18,19)20)6-11(15(10)12)8(2)7-16/h4,8,11-12,14-16H,3,5-7H2,1-2H3,(H,18,19,20)/b10-4+