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