InChI=1/C21H17N3O/c1-2-7-15(8-3-1)21-24-19(17-10-4-5-11-20(17)25-21)13-18(23-24)16-9-6-12-22-14-16/h1-12,14,19,21H,13H2/t19-,21+/m0/s1 EE58501F430655C8