InChI=1/C19H20N4O4/c1-13-11-15(8-9-16(13)23(26)27)19(25)21-20-18(24)12-22-10-4-6-14-5-2-3-7-17(14)22/h2-3,5,7-9,11H,4,6,10,12H2,1H3,(H,20,24)(H,21,25)/f/h20-21H 610B47B93930A4AA