1 H - NMR ( 200 MHz , CDCl 3 ) ; δ 8 . 5 ( d , 1 H ) , 7 . 45 ( d , 1 H ) , 6 . 20 ( d , 1 H ) , 6 . 6 - 6 . 3 ( m , 6 H ) , 5 . 15 ( s , 1 H ) , 4 . 3 ( m , 2 H ) , 4 . 0 ( s , 2 H ) , 2 . 8 ( m , 5 H ) , 3 . 5 ( m , 3 H ) , 2 . 1 ( m , 4 H ) , 1 . 7 ( m , 2 H ) , 1 . 4 ( m , 6 H ) , 0 . 95 ( m , 3 H ) .