8-Chloropyrido[2,3-d]pyridazine
8-Chloro-2,3-dihydro-1H-pyrido[2,3-b][1,4]oxazine
8-Bromo-6-phenylimidazo[1,2-b]pyridazine
7-Chloro-2-(trifluoromethyl)-6,11-dihydro-5h-benzo[b]pyrido[2,3-e][1,4]diazepine
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