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