2,4-Dihydroxy-3-(trifluoromethoxy)pyridine-6-sulfonyl chloride
5-Amino-2-chloro-4-(trifluoromethoxy)pyridine-3-carboxaldehyde
2,3-Dihydroxy-6-(trifluoromethoxy)pyridine-4-sulfonyl chloride
4-Amino-2-(chloromethyl)-5-fluoro-3-(trifluoromethoxy)pyridine