InChI=1S/C18H24N2O7/c1-9(4-5-11-7-10-3-2-6-19-16(10)20-11)8-26-18-14(23)12(21)13(22)15(27-18)17(24)25/h2-3,6-7,9,12-15,18,21-23H,4-5,8H2,1H3,(H,19,20)(H,24,25)