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