1 H - NMR ( 400 MHz , CDCl 3 ) δ = 2 . 57 - 2 . 69 ( 4 H , m , 2 CH 2 ) , 2 . 84 - 2 . 89 ( 2 H , m , CH 2 ) , 3 . 22 - 3 . 25 ( 4 H , m , 2 CH 2 ) , 4 . 05 - 4 . 07 ( 2 H , m , CH 2 ) , 4 . 14 - 4 . 20 ( 1 H , m , CH ) , 6 . 86 - 6 . 90 ( 1 H , t , J = 7 . 2 , Ph ) , 6 . 93 - 6 . 95 ( 2 H , d , J = 7 . 9 , Ph ) , 6 . 99 - 7 . 02 ( 2 H , d , J = 8 . 5 , Ph ) , 7 . 26 - 7 . 30 ( 2 H , m , Ph ) , 7 . 54 - 7 . 56 ( 2 H , d , J = 8 . 6 , Ph ) .