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