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