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