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