Ethyl 4-(difluoromethyl)pyridine-2-carboxylate
Ethyl 3-(difluoromethyl)pyridine-2-carboxylate
3-(Bromomethyl)-2-(difluoromethyl)-4-(trifluoromethoxy)pyridine-6-acetic acid
Ethyl 2-(bromomethyl)-4-(difluoromethyl)-6-(trifluoromethoxy)pyridine-3-acetate