4-Cyano-2,6-dimethoxy-3-(trifluoromethoxy)pyridine
4-Cyano-2,6-difluoro-3-(trifluoromethoxy)pyridine
4-Cyano-2,5-difluoro-3-(trifluoromethoxy)pyridine
4-Cyano-2,3-difluoro-5-(trifluoromethoxy)pyridine
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