InChI=1S/C16H23NO2/c1-9-7-10(2)14-13-12(5-6-17-15(13)18)19-11(3)16(14,4)8-9/h5-6,9-11,14H,7-8H2,1-4H3,(H,17,18)/t9-,10+,11-,14+,16-/m1/s1