1 H - NMR ( 400 MHz , CDCl 3 ) δ = 1 . 92 ( 2 H , m , CH 2 ) , 2 . 42 - 2 . 49 ( 12 H , m , 6 CH 2 ) , 3 . 43 ( 2 H , s , CH 2 ( benzyl ) ) , 8 . 01 ( 1 H , bs , NH ) , 7 . 22 - 8 . 32 ( 7 H , m , Ph ) ;