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