1 H - NMR ( 500 MHz , CDCl 3 , δ ) : 8 . 07 ( d , J = 1 . 5 Hz , 2 H ) , 8 . 00 ( d , J = 1 . 5 Hz , 2 H ) , 7 . 84 ( d , J = 7 . 0 Hz , 2 H ) , 7 . 76 ( d , J = 7 . 0 Hz , 2 H ) , 7 . 63 ( d , J = 8 . 0 Hz , 4 H ) 7 . 58 ( d , J = 8 . 0 Hz , 4 H ) , 7 . 54 - 7 . 43 ( m , 14 H ) , 7 . 38 - 7 . 32 ( m , 8 H ) , 7 . 30 - 7 . 07 ( m , 10 H )