3-Amino-4-(difluoromethyl)-2-nitro-6-(trifluoromethoxy)pyridine
3-Amino-2-(difluoromethyl)-6-nitro-4-(trifluoromethoxy)pyridine
3-Amino-2-(chloromethyl)-5-iodo-4-(trifluoromethoxy)pyridine
3-Amino-2-(difluoromethyl)-4-nitro-6-(trifluoromethoxy)pyridine