1 H - NMR ( 400 MHz , CDCl 3 ) δ = 2 . 39 - 2 . 52 ( 8 H , m , 4 CH 2 ) , 2 . 64 - 2 . 66 ( 2 H , m , CH 2 ) , 3 . 03 - 3 . 13 ( 2 H , m , CH 2 ) , 3 . 45 ( 2 H , m , CH 2 ) , 3 . 87 - 3 . 93 ( 1 H , m , CH ) , 7 . 23 - 7 . 29 ( 4 H , m , Ph ) , 7 . 40 - 7 . 42 ( 2 H , d , J = 8 . 4 , Ph ) , 7 . 49 - 7 . 51 ( 2 H , d , J = 8 . 3 , Ph ) .