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