InChI=1S/C15H20O9S/c1-21-10-6-11(23-15(17)8-10)7-12(16)9-3-4-13(22-2)14(5-9)24-25(18,19)20/h3-5,10-12,16H,6-8H2,1-2H3,(H,18,19,20)