InChI=1S/C15H20N2O8S/c1-15(2)6-11(19)13-12(25-15)4-3-9(14(13)17-20)10(18)5-8(16)7-24-26(21,22)23/h3-4,8,17,20H,5-7,16H2,1-2H3,(H,21,22,23)