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