1 H - NMR ( 400 MHz , CDCl 3 ) δ = 1 . 95 ( 2 H , m , CH 2 ) , 2 . 46 ( 2 H , t , J = 7 . 01 Hz , CH 2 ) , 2 . 51 ( 2 H , t , J = 6 . 57 Hz , CH 2 ) , 2 . 64 ( 4 H , t , J = 4 . 95 Hz , 2 CH 2 ) , 3 . 14 ( 4 H , t , J = 4 . 80 Hz , 2 CH 2 ) , 6 . 85 - 7 . 48 ( 8 H , m , Ph ) , 8 . 42 ( 1 H , bs , NH )