Ethyl 3,4-difluoro-2-(trifluoromethoxy)pyridine-5-carboxylate
Ethyl 2,5-difluoro-3-(trifluoromethoxy)pyridine-4-carboxylate
Ethyl 4,6-difluoro-3-(trifluoromethoxy)pyridine-2-carboxylate
Methyl 2,6-difluoro-3-(trifluoromethoxy)pyridine-4-carboxylate
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