InChI=1S/C20H25NO2/c1-3-4-5-6-7-15-8-9-16-12-20(22)18-13-17(23-2)10-11-19(18)21(16)14-15/h4-5,10-13,15H,3,6-9,14H2,1-2H3/b5-4-/t15-/m1/s1