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