Methyl 2-cyano-4-(difluoromethyl)-3-hydroxypyridine-6-carboxylate
4-(Bromomethyl)-6-cyano-3-(difluoromethyl)-2-nitropyridine
5-(Bromomethyl)-2-cyano-3-(difluoromethyl)-4-methoxypyridine
5-Cyano-3-(difluoromethyl)-4-nitro-2-(trifluoromethyl)pyridine
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