InChI=1S/C20H25N3O/c21-14-18-7-4-12-23(18)20(24)19(22)13-15-8-10-17(11-9-15)16-5-2-1-3-6-16/h1-3,5-6,8-11,18-19H,4,7,12-14,21-22H2/t18-,19-/m0/s1