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