InChI=1S/C15H20N2O7/c1-3-8-9(4-2)17-7(5-16-8)6-23-15-12(20)10(18)11(19)13(24-15)14(21)22/h3,5,10-13,15,18-20H,1,4,6H2,2H3,(H,21,22)