InChI=1S/C17H26N2O2/c1-3-10-19-11-5-4-9-15(19)17(21)18-16-13(2)7-6-8-14(16)12-20/h6-8,15,20H,3-5,9-12H2,1-2H3,(H,18,21)/t15-/m0/s1