1 H - NMR : δ 7 . 96 - 7 . 94 ( m , 2 H ) , 7 . 60 - 7 . 57 ( m , 4 H ) , 7 . 49 - 7 . 42 ( m , 4 H ) , 7 . 37 - 7 . 35 ( m , 3 H ) , 4 . 54 ( s , 2 H ) , 4 . 25 ( t , 2 H , J = 4 . 7 ㎐), 3 . 70 ( t , 2 H , J = 4 . 7 ㎐), 3 . 50 - 3 . 45 ( m , 2 H ) , 3 . 10 - 3 . 08 ( m , 2 H ) , 1 . 64 - 1 . 62 ( m , 2 H ) , 1 . 47 - 1 . 46 ( m , 2 H ) , 1 . 34 - 1 . 04 ( m , 60 H ) , 0 . 88 ( t , 6 H , J = 6 . 75 ㎐)