InChI=1S/C18H24N2O7/c1-8(2)6-11(10-7-9-4-3-5-19-16(9)20-10)26-18-14(23)12(21)13(22)15(27-18)17(24)25/h3-5,7-8,11-15,18,21-23H,6H2,1-2H3,(H,19,20)(H,24,25)