InChI=1S/C16H16O7S/c1-21-16-7-11-6-12(9-22-15(11)8-14(16)17)10-2-4-13(5-3-10)23-24(18,19)20/h2-5,7-8,12,17H,6,9H2,1H3,(H,18,19,20)