InChI=1S/C21H25NO2/c1-21(2,3)12-8-5-9-13-22(4)15-16-14-19(23)20(24)18-11-7-6-10-17(16)18/h5-7,9-11,14,23-24H,13,15H2,1-4H3/b9-5+