Ethyl 3-bromo-4-(difluoromethyl)pyridine-5-carboxylate
2-(Chloromethyl)-6-(difluoromethyl)-3-(trifluoromethoxy)pyridine-4-carboxylic acid
Ethyl 3-bromo-2-(difluoromethyl)pyridine-5-carboxylate
6-(Chloromethyl)-3-(difluoromethyl)-4-(trifluoromethoxy)pyridine-2-carboxylic acid