3-(Difluoromethyl)-6-hydroxy-2-nitro-5-(trifluoromethoxy)pyridine
5-(Difluoromethyl)-2-hydroxy-3-nitro-6-(trifluoromethoxy)pyridine
Methyl 3-fluoro-6-methyl-2-(trifluoromethoxy)pyridine-5-acetate
4-(Difluoromethyl)-3-hydroxy-6-nitro-2-(trifluoromethoxy)pyridine