InChI=1/C20H16N4O4/c1-23-10-15(12-6-4-5-9-16(12)23)18(26)22-21-17(25)11-24-19(27)13-7-2-3-8-14(13)20(24)28/h2-10H,11H2,1H3,(H,21,25)(H,22,26)/f/h21-22H 1E2176F2BA7AC649