 
6-(Bromomethyl)-3-chloro-2-(trifluoromethoxy)pyridine-4-acetic acid
 
 
3-(Bromomethyl)-2-chloro-5-(trifluoromethoxy)pyridine-6-acetic acid
 
 
2-(Bromomethyl)-4-chloro-5-(trifluoromethoxy)pyridine-3-acetic acid
 
 
6-(Bromomethyl)-2-chloro-4-(trifluoromethoxy)pyridine-3-acetic acid