InChI=1S/C19H23N3O2/c1-12(2)8-9-22-11-14(15-6-4-5-7-17(15)22)10-16-19(24)20-13(3)18(23)21-16/h4-8,11,13,16H,9-10H2,1-3H3,(H,20,24)(H,21,23)/t13-,16-/m0/s1