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