InChI=1S/C18H20N2O5/c1-11(19)17(23)20(15(18(24)25)8-9-16(21)22)14-7-6-12-4-2-3-5-13(12)10-14/h2-7,10-11,15H,8-9,19H2,1H3,(H,21,22)(H,24,25)