NMR ( 400 MHz , CDCl 3 ) δ = 1 . 54 ( 2 H , m , CH 2 ) , 1 . 67 ( 2 H , m , CH 2 ) , 2 . 35 - 2 . 46 ( 8 H , m , 4 CH 2 ) , 3 . 16 ( 4 H , m , 2 CH 2 ) , 3 . 45 ( 2 H , s , CH 2 ( benzyl ) ) , 3 . 62 ( 2 H , t , J = 4 . 90 Hz , CH 2 ) , 3 . 77 ( 2 H , t , J = 5 . 00 Hz , CH 2 ) , 6 . 89 - 7 . 30 ( 9 H , m , Ph ) ;