1 H - NMR ( 400 Mz , CDCl 3 ) δ = 2 . 36 - 2 . 51 ( m , 8 H , 4 CH 2 ) , 2 . 64 ( brs , 2 H , CH 2 ) , 2 . 92 - 3 . 03 ( m , 2 H , CH 2 ) , 3 . 49 ( s , 2 H , CH 2 ( benzyl ) ) , 3 . 80 - 3 . 84 ( m , 1 H , CH ) , 6 . 97 - 7 . 41 ( m , 8 H , Ph ) .