1 H - NMR ( 400 MHz , CDCl 3 ) δ = 2 . 27 ( 2 H , m , CH 2 ) , 2 . 56 ( 2 H , t , J = 7 . 02 Hz , CH 2 ) , 3 . 52 ( 2 H , t , J = 6 . 18 Hz , CH 2 ) , 7 . 41 ( 1 H , bs , NH ) , 7 . 26 - 7 . 47 ( 4 H , m , Ph ) ;