Ethyl 2-(difluoromethyl)-5-methyl-3-nitropyridine-4-acetate
Ethyl 6-(difluoromethyl)-4-methyl-3-nitropyridine-2-acetate
2-(Chloromethyl)-6-(difluoromethyl)-3-methoxypyridine-5-acetic acid
6-(Chloromethyl)-3-(difluoromethyl)-2-methoxypyridine-4-acetic acid