1 H - NMR ( 400 MHz , CDCl 3 ) δ = 2 . 46 - 2 . 68 ( 10 H , m , 5 CH 2 ) , 3 . 72 ( 2 H , s , CH 2 ) , 3 . 99 - 4 . 01 ( 2 H , m , CH 2 ) , 4 . 05 - 4 . 11 ( 1 H , m , CH ) , 6 . 96 - 7 . 01 ( 3 H , m , Ph ) , 7 . 19 - 7 . 21 ( 2 H , m , Ph ) , 7 . 52 - 7 . 54 ( 2 H , d , J = 8 . 7 , Ph ) .