Benzyl 3-(methylamino)-7,8-dihydropyrido[4,3-c]pyridazine-6(5h)-carboxylate
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
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