InChI=1S/C21H23N3O2/c1-4-21(2,3)18-14(13-8-5-6-9-15(13)22-18)12-16-20(26)24-11-7-10-17(24)19(25)23-16/h4-6,8-9,12,17,22H,1,7,10-11H2,2-3H3,(H,23,25)/b16-12-/t17-/m0/s1