Methyl 2-(difluoromethyl)-3-methyl-5-nitropyridine-4-carboxylate
Methyl 2-(difluoromethyl)-3-methyl-4-nitropyridine-5-carboxylate
3-(Difluoromethyl)-6-methyl-2-nitropyridine-5-carboxylic acid
5-(Difluoromethyl)-2-methyl-4-nitropyridine-3-carboxylic acid