InChI=1S/C15H22O7S/c1-7-6-21-10-4-9-5-11(22-23(18,19)20)13(16)8(2)15(9,3)14(17)12(7)10/h6,8-9,11,13-14,16-17H,4-5H2,1-3H3,(H,18,19,20)