InChI=1S/C15H20O9S/c1-21-12-6-4-9(7-11(12)16)3-5-10-8-13(22-2)14(15(17)23-10)24-25(18,19)20/h4,6-7,10,13-14,16H,3,5,8H2,1-2H3,(H,18,19,20)