1 H - NMR ( 400 MHz , CDCl 3 ) δ = 2 . 49 - 2 . 61 ( 8 H , m , 4 CH 2 ) , 2 . 72 ( 2 H , s , CH 2 ) , 3 . 45 ( 2 H , s , CH 2 ) , 4 . 01 - 4 . 04 ( 2 H , m , CH 2 ) , 4 . 07 - 4 . 12 ( 1 H , m , CH ) , 6 . 97 - 6 . 99 ( 2 H , d , J = 8 . 2 , Ph ) , 7 . 14 - 7 . 16 ( 1 H , dd , J 1 = 8 . 2 , J 2 = 1 . 9 , Ph ) , 7 . 36 - 7 . 38 ( 1 H , d , J = 8 . 1 , Ph ) , 7 . 43 - 7 . 44 ( 1 H , d , J = 1 . 9 , Ph ) , 7 . 52 - 7 . 54 ( 2 H , d , J = 9 . 1 , Ph ) .