InChI=1S/C20H20N2O5/c1-26-15-8-10(2-4-13(15)23)19-18(20(24)25)17-14(27-19)5-3-12-16(17)11(6-7-21)9-22-12/h2-5,8-9,18-19,22-23H,6-7,21H2,1H3,(H,24,25)