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