3-Amino-6-(difluoromethyl)-4-(trifluoromethoxy)pyridine-2-carboxylic acid
3-Bromo-5-cyano-2-(trifluoromethoxy)pyridine-4-acetic acid
5-Amino-2-(difluoromethyl)-3-(trifluoromethoxy)pyridine-4-carboxylic acid
4-Bromo-5-chloro-2-(difluoromethyl)-3-(trifluoromethoxy)pyridine