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