InChI=1S/C15H20O7S/c1-4-9-6-14(15(2,3)17)22-13-5-10(8-21-23(18,19)20)12(16)7-11(9)13/h4-5,7,9,14,16-17H,1,6,8H2,2-3H3,(H,18,19,20)