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