1 H - NMR ( 400 MHz , CDCl 3 ) : 8 . 02 ∼ 8 . 00 ( m , 4 H ) , 7 . 89 ∼ 7 . 86 ( m , 8 H ) , 7 . 82 ∼ 7 . 80 ( m , 4 H ) , 7 , 76 ( s , 4 H ) , 7 . 64 ∼ 7 . 62 ( m , 4 H ) , 7 . 57 ∼ 7 . 50 ( m , 8 H ) , 7 . 47 ∼ 6 . 43 ( m , 6 H ) .