InChI=1/C15H21N3O2/c1-10(2)16-15(20)17-14(19)9-18-8-7-12-11(3)5-4-6-13(12)18/h4-6,10H,7-9H2,1-3H3,(H2,16,17,19,20)/f/h16-17H 3C45E32F67DFD3D4