InChI=1S/C19H23N3O2/c1-11(2)7-8-13-5-4-6-15-14(10-20-17(13)15)9-16-19(24)21-12(3)18(23)22-16/h4-7,10,12,16,20H,8-9H2,1-3H3,(H,21,24)(H,22,23)/t12-,16?/m0/s1