InChI=1/C20H18N4O4/c1-20(18(26)22-19(27)23-20)13-8-5-9-14(10-13)21-17(25)15-11-16(28-24-15)12-6-3-2-4-7-12/h2-10,16H,11H2,1H3,(H,21,25)(H2,22,23,26,27)/t16-,20-/m1/s1/f/h21-23H B0ED61D28517168A