Methyl 2-chloro-5-(difluoromethyl)-3-(trifluoromethoxy)pyridine-4-acetate
Methyl 4-cyano-2-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-5-acetate
Methyl 5-cyano-3-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-2-acetate
Methyl 6-chloro-4-(difluoromethyl)-3-(trifluoromethoxy)pyridine-2-acetate