InChI=1S/C20H23N3O2/c1-3-4-8-16-11-13-17(14-12-16)21-20(25)19(15(2)24)23-22-18-9-6-5-7-10-18/h5-7,9-14,22H,3-4,8H2,1-2H3,(H,21,25)/b23-19+