InChI=1S/C15H21NO11S2/c17-6-10-12(20)13(21)14(22)15(26-10)28-11(16-27-29(23,24)25)5-9(19)7-1-3-8(18)4-2-7/h1-4,9-10,12-15,17-22H,5-6H2,(H,23,24,25)/b16-11+