InChI=1S/C21H27NO2/c1-4-20(24-17(3)23)21(15-16(2)22,18-11-7-5-8-12-18)19-13-9-6-10-14-19/h5-14,16,20H,4,15,22H2,1-3H3/t16-,20-/m0/s1