InChI=1S/C21H21N3O2/c1-13-3-6-18(21-24-23-14(2)26-21)11-19(13)16-7-9-17(10-8-16)20(25)22-12-15-4-5-15/h3,6-11,15H,4-5,12H2,1-2H3,(H,22,25)