1 H - NMR ( 400 MHz , CDCl 3 ) δ = 2 . 60 - 2 . 70 ( 4 H , m , 2 CH 2 ) , 2 . 88 - 2 . 92 ( 2 H , m , CH 2 ) , 3 . 11 ( 4 H , s , 2 CH 2 ) , 4 . 05 - 4 . 07 ( 2 H , m , CH 2 ) , 4 . 14 - 4 . 20 ( 1 H , m , CH 2 ) , 6 . 97 - 7 . 07 ( 4 H , m , Ph ) , 7 . 21 - 7 . 26 ( 1 H , td , J 1 = 7 . 3 , J 2 = 1 . 4 , Ph ) , 7 . 36 - 7 . 38 ( 1 H , dd , J 1 = 7 . 9 , J 2 = 1 . 5 , Ph ) , 7 . 54 - 7 . 56 ( 2 H , d , J = 8 . 6 , Ph ) .