Ethyl 2-hydroxy-5-(perfluorophenyl)isonicotinate
2-Amino-5-bromo-3-(trifluoromethoxy)pyridine-4-sulfonyl chloride
5-Iodo-2-methoxypyridine-4-sulfonyl chloride
2-(3-Chloro-4-iodobenzoyl)pyridine
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