1 H - NMR ( 400 MHz , CDCl 3 ) : δ = 8 . 02 ∼ 7 . 98 ( m , 4 H ) , 7 . 88 ∼ 7 . 85 ( m , 1 H ) , 7 . 73 ∼ 7 . 66 ( m , 6 H ) , 7 . 65 ∼ 7 . 51 ( m , 9 H ) , 7 . 47 ∼ 7 . 37 ( m , 6 H ) , 7 . 38 ∼ 7 . 33 ( m , 4 H ) .