1 H - NMR ( 400 MHz , CDCl 3 ) δ = 2 . 40 - 2 . 53 ( 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 . 47 ( 2 H , m , CH 2 ) , 3 . 87 - 3 . 93 ( 1 H , m , CH ) , 7 . 16 - 7 . 24 ( 3 H , m , Ph ) , 7 . 32 ( 1 H , s , Ph ) , 7 . 41 - 7 . 43 ( 2 H , d , J = 8 . 2 , Ph ) , 7 . 49 - 7 . 52 ( 2 H , d , J = 8 . 3 , Ph ) .