2-Hydroxy-5-methoxy-3-(trifluoromethoxy)pyridine-4-sulfonyl chloride
6-Hydroxy-4-methoxy-3-(trifluoromethoxy)pyridine-2-sulfonyl chloride
4-Hydroxy-6-methyl-2-nitro-3-(trifluoromethoxy)pyridine
2-Hydroxy-4-methoxy-3-(trifluoromethoxy)pyridine-5-sulfonyl chloride