InChI=1/C19H25N3O3/c1-13-2-4-14(5-3-13)6-7-15-8-10-22(11-9-15)17(23)12-16-18(24)21-19(25)20-16/h2-5,15-16H,6-12H2,1H3,(H2,20,21,24,25)/t16-/m1/s1/f/h20-21H 45AB24308098010B