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