1 H - NMR ( 400 MHz , CDCl 3 ) δ = 1 . 55 ( 2 H , m , CH 2 ) , 1 . 67 ( 2 H , m , CH 2 ) , 1 . 75 ( 4 H , s , 2 CH 2 ) , 2 . 38 ( 4 H , t , J = 7 . 46 Hz , 2 CH 2 ) , 2 . 47 ( 4 H , s , 2 CH 2 ) , 3 . 04 ( 2 H , t , J = 5 . 13 Hz , CH 2 ) , 3 . 07 ( 2 H , t , J = 5 . 05 Hz , CH 2 ) , 3 . 50 ( 2 H , s , CH 2 ( benzyl ) ) , 3 . 63 ( 2 H , t , J = 4 . 90 Hz , CH 2 ) , 3 . 79 ( 2 H , t , J = 4 . 99 Hz , CH 2 ) , 6 . 92 - 7 . 29 ( 8 H , m , Ph ) ;