2-Methoxy-5-nitro-3-(trifluoromethoxy)pyridine-4-sulfonyl chloride
6-Methoxy-4-nitro-3-(trifluoromethoxy)pyridine-2-sulfonyl chloride
4-Methoxy-2-nitro-3-(trifluoromethoxy)pyridine-5-carbonyl chloride
3-Methoxy-5-nitro-2-(trifluoromethoxy)pyridine-4-carbonyl chloride