6-Bromo-2-(fluoromethyl)-4-(trifluoromethoxy)pyridine-3-carboxylic acid
3-Bromo-4-(chloromethyl)-5-(trifluoromethoxy)pyridine-2-acetic acid
2-Bromo-3-(chloromethyl)-6-(trifluoromethoxy)pyridine-5-acetic acid
2-Bromo-4-(fluoromethyl)-3-(trifluoromethoxy)pyridine-5-carboxylic acid