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