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