Methyl 2-(difluoromethyl)-3-methoxy-6-nitropyridine-5-carboxylate
5-(Difluoromethyl)-3-methyl-4-nitropyridine-2-acetic acid
3-(Difluoromethyl)-5-methyl-2-nitropyridine-6-acetic acid
3-(Difluoromethyl)-5-methoxy-4-(trifluoromethyl)pyridine-2-acetonitrile