1 H NMR ( 400 MHz , CDCl 3 , rt ) : δ ( ppm ) 0 . 91 ( t , J = 7 . 5 Hz , 6 H , CH 3 ) , 1 . 28 ( m , J = 4 . 2 Hz , 12 H , CH 2 ) , 1 . 56 ( m , J = 7 . 5 Hz , 4 H , CH 2 ) , 1 . 69 ( m , J = 4 . 2 Hz , 1 H , CH ) , 2 . 04 ( s , 3 H , CH 3 C ) , 3 . 12 ( d , J = 7 . 6 Hz , 2 H , NCH 2 ) 3 . 23 ( t , J = 6 . 0 Hz , 2 H , NCH 2 ) , 4 . 05 ( t , J = 6 . 6 Hz , 2 H , OCH 2 ) , 6 . 77 ( d , J = 6 . 0 Hz , 2 H , aromatic protons ) , 8 . 54 ( d , J = 6 . 0 Hz , 2 H , aromatic protons ) , 9 . 09 ( s , 1 H , NH ) .