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