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