Ethyl 2-(difluoromethyl)-4-(trifluoromethyl)pyridine-5-acetate
Ethyl 2-(difluoromethyl)-3-(trifluoromethyl)pyridine-5-acetate
Methyl 4-(difluoromethyl)-3-(trifluoromethyl)pyridine-5-acetate
Ethyl 4-(difluoromethyl)-2-(trifluoromethyl)pyridine-5-carboxylate