1 H - NMR ( 400 MHz , CDCl 3 ) δ = 1 . 90 ( 2 H , m , CH 2 ) , 2 . 39 - 2 . 55 ( 12 H , m , 6 CH 2 ) , 3 . 70 ( 2 H , s , CH 2 ( benzyl ) ) , 8 . 09 ( 1 H , bs , NH ) , 6 . 95 - 8 . 32 ( 6 H , m , Ph ) ;