InChI=1S/C15H22N2O/c18-13-4-6-17-9-11-7-12(15(17)8-13)10-16-5-2-1-3-14(11)16/h4,6,11-12,14-15H,1-3,5,7-10H2/t11?,12?,14-,15+/m0/s1