InChI=1/C20H20N2O4/c1-12-8-9-16(21-13(2)23)17(10-12)22-19(25)20(3)11-14-6-4-5-7-15(14)18(24)26-20/h4-10H,11H2,1-3H3,(H,21,23)(H,22,25)/t20-/m0/s1/f/h21-22H	B37E9D3209847215