InChI=1/C20H20N4O4/c1-12-5-3-4-6-14(12)17-22-18(28-23-17)13-7-8-15-16(11-13)21-20(26)24(19(15)25)9-10-27-2/h3-8,11,18H,9-10H2,1-2H3,(H,21,26)(H,22,23)/p+1/t18-/m0/s1/fC20H21N4O4/h21-23H/q+1 80BDF6B9BDB4BB9C