1 H NMR ( 400 MHz , CDCl 3 ) δ 8 . 74 - 8 . 67 ( 1 H , m ) , 8 . 31 - 8 . 24 ( 2 H , m ) , 8 . 08 - 8 . 00 ( 1 H , m ) , 7 . 61 - 7 . 54 ( 1 H , m ) , 7 . 01 - 6 . 96 ( 1 H , m ) , 3 . 65 ( 3 H , s ) ;