InChI=1/C19H14N2O2/c22-15-10-8-14(9-11-15)18-17(13-5-2-1-3-6-13)20-19(21-18)16-7-4-12-23-16/h1-12,22H,(H,20,21)/f/h21H 212C220E17F0444D