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