6-Chloro-3-cyano-2-(difluoromethyl)-4-methylpyridine
2-Chloro-5-cyano-4-(difluoromethyl)-3-methylpyridine
5-Bromo-4-(difluoromethyl)-3-(trifluoromethyl)pyridine-2-carboxylic acid
3-Bromo-2-(difluoromethyl)-6-(trifluoromethyl)pyridine-5-carboxylic acid