Methyl 5-(bromomethyl)-3-(difluoromethyl)-2-fluoropyridine-4-acetate
4-(Bromomethyl)-3-(difluoromethyl)-2-iodopyridine-6-acetic acid
4-Amino-2-(aminomethyl)-5-(difluoromethyl)-3-nitropyridine
3-Bromo-4-methoxy-6-(trifluoromethoxy)pyridine-2-acetic acid