InChI=1S/C15H22O6S/c1-5-9-13-10(7(2)3)6-11(16)8(4)12(13)15(14(9)17)21-22(18,19)20/h5,7,10-13,15-16H,4,6H2,1-3H3,(H,18,19,20)/b9-5+