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