InChI=1/C16H19N3O2/c17-9-13-2-1-7-19(13)16(21)15-8-12(10-18-15)11-3-5-14(20)6-4-11/h3-6,12-13,15,18,20H,1-2,7-8,10H2/t12-,13-,15-/m0/s1 90B70A9CF0E3CF2D