Methyl 2-(difluoromethyl)-5-methyl-4-nitropyridine-3-carboxylate
Ethyl 6-(difluoromethyl)-2-methyl-3-nitropyridine-4-carboxylate
Methyl 4-(difluoromethyl)-5-methyl-3-nitropyridine-2-acetate
Methyl 2-(difluoromethyl)-4-methyl-6-nitropyridine-3-carboxylate