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Under IUPAC nomenclature, a molecule named N-[(2R)-4-(furan-2-yl)butan-2-yl]-3-[6-(furan-2-ylmethylamino)-[1,2,4]triazolo[4,3-b]pyridazin-3-yl]propanamide is given. What is its corresponding molecular formula?
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C21H24N6O3
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