Ethyl 4-(difluoromethyl)-3-methoxy-6-nitropyridine-2-carboxylate
2-(Difluoromethyl)-3-methyl-4-nitropyridine-5-acetonitrile
3-(Difluoromethyl)-6-methyl-2-nitro-5-(trifluoromethyl)pyridine
5-(Difluoromethyl)-2-methyl-4-nitro-3-(trifluoromethyl)pyridine