 
Ethyl 2-(bromomethyl)-3-chloro-4-(trifluoromethoxy)pyridine-6-carboxylate
 
 
3-(Bromomethyl)-6-chloro-4-(trifluoromethoxy)pyridine-2-carboxylic acid
 
 
4-(Bromomethyl)-5-chloro-3-(trifluoromethoxy)pyridine-2-carboxylic acid
 
 
4-(Bromomethyl)-2-chloro-3-(trifluoromethoxy)pyridine-5-carboxylic acid