InChI=1S/C15H22N2O2/c1-3-17(4-2)14(19)15(9-12(15)10-16)11-5-7-13(18)8-6-11/h5-8,12,18H,3-4,9-10,16H2,1-2H3/t12-,15+/m0/s1