Methyl 2-(difluoromethyl)-4-methoxy-3-nitropyridine-5-carboxylate
6-(Chloromethyl)-3-(difluoromethyl)-2-methyl-4-nitropyridine
2-(Chloromethyl)-5-(difluoromethyl)-4-methyl-3-nitropyridine
Methyl 2-(difluoromethyl)-3-methoxy-6-nitropyridine-4-carboxylate