2-Amino-5-(difluoromethyl)-3-nitropyridine-4-sulfonamide
6-(Aminomethyl)-3-chloro-4-(difluoromethyl)pyridine-2-carboxylic acid
Methyl 2-amino-3-(difluoromethyl)-6-iodopyridine-4-acetate
3-(Difluoromethyl)-5-fluoro-2-(trifluoromethyl)pyridine-6-carboxylic acid