6-Cyano-2-(difluoromethyl)-3,4-dimethoxypyridine
2-Cyano-4-(difluoromethyl)-3,6-dimethoxypyridine
6-Chloro-2-(difluoromethyl)-3,4-dimethoxypyridine
2-Chloro-6-(difluoromethyl)-3,4-dimethoxypyridine
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