Methyl 3-cyano-4-(difluoromethyl)picolinate
Methyl 2-cyano-3-(difluoromethyl)pyridine-4-acetate
Ethyl 6-cyano-2-(difluoromethyl)pyridine-3-acetate
Methyl 5-cyano-6-(difluoromethyl)nicotinate
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