InChI=1/C18H13N3O/c22-18-20-16-14(12-7-3-1-4-8-12)11-15(19-17(16)21-18)13-9-5-2-6-10-13/h1-11H,(H2,19,20,21,22)/f/h20-21H A4E7EA6534AD5FD5