Ethyl 6-(chloromethyl)-4-(difluoromethyl)-3-hydroxypyridine-2-carboxylate
Methyl 4-bromo-3-(difluoromethyl)-2-iodopyridine-6-carboxylate
4-Amino-5-methoxy-2-(trifluoromethoxy)pyridine-3-acetic acid
Ethyl 6-amino-4-(aminomethyl)-2-(difluoromethyl)pyridine-3-acetate