1 H - NMR ( 400 Mz , CDCl 3 ) δ = 2 . 34 - 2 . 49 ( m , 8 H , 4 CH 2 ) , 2 . 24 ( brs , 2 H , CH 2 ) , 2 . 91 - 3 . 01 ( m , 2 H , CH 2 ) , 3 . 44 ( s , 2 H , CH 2 ( benzyl ) ) , 3 . 78 - 3 . 84 ( m , 1 H , CH ) , 6 . 96 - 7 . 40 ( m , 8 H , Ph ) .