3,7-Dibromo-5H-cyclopenta[1,2-b:5,4-b']dipyridin-5-one
5-Fluoro-4-iodo-1-methylpyridin-2(1H)-one
8-Bromo-6-chloro-3-iodo-2-methylimidazo[1,2-b]pyridazine
8-Chloro-1,2,3,4-tetrahydropyrido[3,4-b]pyrazine
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