InChI=1S/C19H22N2O9S2/c1-28-21-11-6-8(29-18-14(24)12(22)13(23)15(30-18)17(26)27)4-5-9(11)10(16(21)25)7-20-19(31-2)32-3/h4-7,12-15,18,22-24H,1-3H3,(H,26,27)/b10-7-