1 H - NMR : δ 7 . 81 ( d , 2 H , J = 8 . 4 ㎐), 7 . 59 - 7 . 55 ( m , 4 H ) , 7 . 44 ( t , 2 H , J = 7 . 6 ㎐), 7 . 37 - 7 . 30 ( m , 5 H ) , 4 . 53 ( s , 2 H ) , 4 . 23 ( t , 2 H , J = 4 . 8 ㎐), 3 . 70 ( t , 2 H , J = 4 . 8 ㎐), 2 . 67 ( t , 2 H , J = 8 . 2 ㎐), 1 . 74 - 1 . 64 ( m , 5 H ) , 1 . 51 - 1 . 47 ( m , 2 H ) , 1 . 25 - 1 . 13 ( m , 4 H ) , 0 . 96 - 0 . 88 ( m , 2 H )