Ethyl 4-bromo-3-(difluoromethyl)pyridine-2-acetate
5-(Chloromethyl)-4-(difluoromethyl)-3-(trifluoromethoxy)pyridine-2-acetic acid
Ethyl 4-bromo-2-(difluoromethyl)pyridine-3-acetate
3-(Chloromethyl)-4-(difluoromethyl)-2-(trifluoromethoxy)pyridine-5-acetic acid