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