5-Cyano-3-(difluoromethyl)-4-nitro-2-(trifluoromethyl)pyridine
5-(Bromomethyl)-4-cyano-3-(difluoromethyl)-2-methoxypyridine
6-Cyano-2-(difluoromethyl)-3-nitropyridine-4-methanol
2-Cyano-5-(difluoromethyl)-3-hydroxypyridine-4-acetic acid
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