4-Amino-6-chloro-2-(trifluoromethoxy)pyridine-3-carboxylic acid
5-Amino-2-(difluoromethyl)-3-iodo-6-(trifluoromethoxy)pyridine
4-Amino-2-chloro-5-(trifluoromethoxy)pyridine-3-carboxylic acid
6-Amino-4-(difluoromethyl)-3-iodo-2-(trifluoromethoxy)pyridine