1 H NMR ( 300 MHz , CDCl 3 , rt ) : δ ( ppm ) 0 . 94 ( t , J = 8 . 0 Hz , 6 H , CH 3 ) , 1 . 32 ~ 1 . 44 ( m , 16 H , CH 2 ) , 1 . 54 ~ 1 . 66 ( m , 6 H , CH 2 ) , 1 . 68 ( t , J = 8 . 0 Hz , 1 H , HOC ) 1 . 78 ~ 1 . 90 ( m , 3 H , CH 2 ) , 3 . 35 ( d , J = 7 . 6 Hz , 2 H , NCH 2 ) 3 . 44 ( t , J = 7 . 0 Hz , 2 H , NCH 2 ) , 3 . 96 ( t , J = 6 . 6 Hz , 2 H , NCH 2 ) , 4 . 05 ( t , J = 6 . 7 Hz , 2 H , OCH 2 ) , 4 . 29 ( t , J = 7 . 0 Hz , 2 H , NCH 2 ) , 6 . 73 ( t , J = 8 . 7 Hz , 2 H , aromatic protons ) , 7 . 19 ( t , J = 8 . 7 Hz , 2 H , aromatic protons ) , 7 . 19 ( t , J = 8 . 7 Hz , 2 H , aromatic protons ) , 7 . 39 ( d , J = 8 . 7 Hz , 2 H , aromatic protons ) , 7 . 46 ( t , J = 8 . 7 Hz , 2 H , aromatic protons ) , 8 . 07 ( d , J = 8 . 7 Hz , 2 H , aromatic protons ) , 8 . 46 ( d , J = 8 . 7 Hz , 2 H , aromatic protons ) .