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