InChI=1/C20H20N2O4/c1-4-25-20(24)19(23)22-15-9-12(2)18(13(3)10-15)26-16-5-6-17-14(11-16)7-8-21-17/h5-11,21H,4H2,1-3H3,(H,22,23)/f/h22H	33B46A49A333BC83