InChI=1S/C15H20N2O8S/c1-15(2)5-10(20)13-11(25-15)4-9(19)12(14(13)17)8(18)3-7(16)6-24-26(21,22)23/h4,7,19H,3,5-6,16-17H2,1-2H3,(H,21,22,23)