Methyl 5-(difluoromethyl)-2-nitropyridine-4-acetate
4-(Chloromethyl)-2-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-6-acetic acid
Methyl 4-(difluoromethyl)-3-nitropyridine-5-acetate
3-(Chloromethyl)-5-(trifluoromethoxy)-6-(trifluoromethyl)pyridine-2-acetic acid