6-Amino-4-(difluoromethyl)-3-nitro-2-(trifluoromethoxy)pyridine
6-Amino-2-(chloromethyl)-3-hydroxy-4-(trifluoromethoxy)pyridine
2-Amino-4-(difluoromethyl)-3-nitro-5-(trifluoromethoxy)pyridine
5-Amino-4-hydroxy-3-(trifluoromethoxy)pyridine-2-acetic acid