2-Hydroxy-5-iodo-4-(trifluoromethoxy)pyridine-3-sulfonyl chloride
2-Hydroxy-3-nitro-4-(trifluoromethoxy)-6-(trifluoromethyl)pyridine
3-(Difluoromethyl)-6-hydroxy-2-nitro-5-(trifluoromethoxy)pyridine
5-(Difluoromethyl)-2-hydroxy-3-nitro-6-(trifluoromethoxy)pyridine