Methyl 3-bromo-5-(bromomethyl)-4-(difluoromethyl)pyridine-2-carboxylate
Methyl 2-chloro-3-(difluoromethyl)-5-fluoropyridine-6-carboxylate
3-Chloro-6-(difluoromethyl)-2-fluoropyridine-4-carboxylic acid
Methyl 3-bromo-4-(bromomethyl)-6-(difluoromethyl)pyridine-2-carboxylate