1 H NMR ( CDCl 3 , 300 ㎒): δ 7 . 4 - 7 . 37 ppm ( d , 2 H , J = 8 . 81 ㎐), 6 . 81 - 6 . 78 ppm ( d , 2 H , J = 8 . 84 ㎐), 3 . 95 - 3 . 91 ppm ( t , 2 H , J = 6 . 55 ㎐), 1 . 82 - 1 . 77 ppm ( m , 2 H ) , 1 . 31 ppm ( m , 14 H ) , 0 . 94 - 0 . 90 ppm ( t , 3 H , J = 6 . 52 ㎐)