InChI=1/C21H17N5O/c22-20(26-27)16-8-6-14(7-9-16)18-19(15-10-12-23-13-11-15)25-21(24-18)17-4-2-1-3-5-17/h1-13,27H,(H2,22,26)(H,24,25)/f/h24H,22H2/b26-20- 99FB6C7027D21DC8