InChI=1S/C19H18N2O5/c20-6-5-10-8-21-11-2-4-14-16(15(10)11)17(19(24)25)18(26-14)9-1-3-12(22)13(23)7-9/h1-4,7-8,17-18,21-23H,5-6,20H2,(H,24,25)