InChI=1S/C15H20N2O8S/c1-7(2)15(4,14(20)21)17-12(16)10-9(13(18)19)6-5-8(3)11(10)25-26(22,23)24/h5-7H,1-4H3,(H2,16,17)(H,18,19)(H,20,21)(H,22,23,24)