Methyl 3-(chloromethyl)-6-(difluoromethyl)-4-methoxypyridine-2-carboxylate
Ethyl 6-(chloromethyl)-2-(difluoromethyl)-4-methoxypyridine-3-carboxylate
Methyl 4-(chloromethyl)-5-(difluoromethyl)-3-methoxypyridine-2-carboxylate
Methyl 4-(chloromethyl)-2-(difluoromethyl)-3-methoxypyridine-5-carboxylate