Ethyl 2-(difluoromethyl)-3,4-dimethoxypyridine-6-carboxylate
6-(Difluoromethyl)-2,3-dimethoxypyridine-5-acetonitrile
Ethyl 3-(difluoromethyl)-2,6-dimethoxypyridine-5-carboxylate
5-(Difluoromethyl)-2,3-dimethoxypyridine-4-acetonitrile
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