InChI=1S/C16H19N3O2/c1-9(2)14-16(21)18-13(15(20)19-14)7-10-8-17-12-6-4-3-5-11(10)12/h3-6,8-9,13-14,17H,7H2,1-2H3,(H,18,21)(H,19,20)/t13-,14-/m0/s1