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