Methyl 2-cyano-4-(difluoromethyl)-6-fluoropyridine-3-carboxylate
Ethyl 3-cyano-4-(difluoromethyl)-2-fluoropyridine-6-carboxylate
Methyl 6-cyano-3-(difluoromethyl)-2-fluoropyridine-4-acetate
Methyl 2-cyano-3-(difluoromethyl)-6-fluoropyridine-4-acetate