6-Bromo-3-nitro-2-(trifluoromethoxy)pyridine-4-carboxylic acid
2-Bromo-5-nitro-3-(trifluoromethoxy)pyridine-6-carboxylic acid
2-Bromo-4-(chloromethyl)-3-methoxy-5-(trifluoromethoxy)pyridine
2-Bromo-4-nitro-6-(trifluoromethoxy)pyridine-3-carboxylic acid