Ethyl 4-hydroxy-6-methyl-2-oxo-1,2-dihydropyridine-3-carboxylate
Methyl 3,6-dichloro-5-methylpyridazine-4-carboxylate
Ethyl 3-(3-bromopyridin-4-yl)propanoate
7-Chloro-2-iodofuro[3,2-b]pyridine
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