InChI=1/C21H16N2O2/c24-20-19(13-17-11-6-10-16-9-4-5-12-18(16)17)22-21(25)23(20)14-15-7-2-1-3-8-15/h1-13H,14H2,(H,22,25)/b19-13+/f/h22H CB0E958352C662EC