InChI=1/C19H16N4O4/c1-2-9(12-14(24)10-5-3-7-20-16(10)22-18(12)26)13-15(25)11-6-4-8-21-17(11)23-19(13)27/h3-9H,2H2,1H3,(H2,20,22,24,26)(H2,21,23,25,27)/p-2/fC19H14N4O4/h22-23H/q-2 1C260F0DE27A94B8