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