InChI=1/C9H17NO9S2/c1-2-5(10-19-21(15,16)17)20-9-8(14)7(13)6(12)4(3-11)18-9/h4,6-9,11-14H,2-3H2,1H3,(H,15,16,17)/b10-5+/t4?,6-,7+,8?,9+/s2