1 H - NMR ( 400 MHz , CDCl 3 ) δ = 2 . 48 - 2 . 59 ( m , 8 H , 4 CH 2 ) , 2 . 70 ( brs , 2 H , CH 2 ) , 3 . 45 ( s , 2 H , CH 2 ) , 3 . 93 ( d , 1 H , J = 2 . 532 Hz , CHA ) , 3 . 95 ( d , 1 H , J = 1 . 08 Hz , CHB ) , 4 . 04 - 4 . 09 ( m , 1 H , CH ) , 6 . 82 - 7 . 43 ( m , 7 H , Ph ) .