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system
Name the molecular formula for the molecule established as 2-[(2S)-1-[4-(3-bromoimidazo[1,2-b]pyridazin-6-yl)-2-oxopyridin-1-yl]-4-methylpentan-2-yl]-1a,7b-dihydrooxireno[2,3-c]isoquinolin-3-one using the IUPAC nomenclature.
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C26H24BrN5O3
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