InChI=1S/C15H19N3O2/c1-16-5-4-11-8-17-14-3-2-10(7-13(11)14)6-12-9-20-15(19)18-12/h2-3,7-8,12,16-17H,4-6,9H2,1H3,(H,18,19)/t12-/m0/s1