Methyl 5-(bromomethyl)-2-(difluoromethyl)-3-methoxypyridine-4-acetate
Methyl 4-(bromomethyl)-3-(difluoromethyl)-6-methoxypyridine-2-acetate
Methyl 4-(bromomethyl)-3-(difluoromethyl)-5-methoxypyridine-2-acetate
Methyl 4-(bromomethyl)-3-(difluoromethyl)-2-methoxypyridine-5-acetate