3,6-Difluoro-2-nitro-4-(trifluoromethoxy)pyridine
2,6-Dichloro-3-methyl-5-(trifluoromethoxy)pyridine
6-Hydroxy-3-nitro-2-(trifluoromethoxy)pyridine
2,5-Difluoro-3-nitro-6-(trifluoromethoxy)pyridine
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