6-Methoxy-4-nitro-2-(trifluoromethoxy)pyridine-3-carboxylic acid
5-(Chloromethyl)-2-iodo-3-(trifluoromethoxy)pyridine-6-acetic acid
2-Methoxy-4-nitro-5-(trifluoromethoxy)pyridine-3-carboxylic acid
2-Methoxy-3-nitro-6-(trifluoromethoxy)pyridine-5-carboxylic acid