InChI=1S/C22H20N2O5/c1-14-19(23-21(28-14)16-5-3-2-4-6-16)11-12-27-17-9-7-15(8-10-17)13-18-20(25)24-29-22(18)26/h2-10,18H,11-13H2,1H3,(H,24,25)