InChI=1/C20H18N2O5/c1-26-14-10-6-9-13(11-14)16-15(18(23)12-7-4-3-5-8-12)17(19(24)27-2)22-20(25)21-16/h3-11,16,23H,1-2H3,(H,21,25)/p-1/b18-15-/t16-/m1/s1/fC20H17N2O5/h23h,25H/q-1 B1866A5E73E0338E