1 H - NMR ( 400 MHz , CDCl 3 ) δ = 2 . 47 - 2 . 58 ( m , 8 H , 4 CH 2 ) , 2 . 71 ( brs , 2 H , CH 2 ) , 3 . 60 ( s , 2 H , CH 2 ) , 3 . 93 ( d , H , J = 1 . 948 Hz , CHA ) , 3 . 94 ( s , 1 H , CHB ) , 4 . 02 - 4 . 07 ( m , 1 H , CH ) , 6 . 83 - 7 . 36 ( m , 8 H , Ph ) .