InChI=1/C19H23N3O/c1-3-5-9-19-10-8-16(23)12(4-2)17(19)13-6-7-15-18(14(13)11-19)21-22-20-15/h6-7H,3-5,8-11H2,1-2H3,(H,20,21,22)/t19-/m1/s1/f/h20H 94DC2E40AB8A543D