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Under IUPAC nomenclature, a molecule named N-[2-[(4bR,8aS)-2,4-dioxo-1,4b,5,6,7,8-hexahydro-[1]benzofuro[2,3-d]pyrimidin-8a-yl]ethyl]-2-(3-methyl-6-oxopyridazin-1-yl)acetamide is given. What is its corresponding molecular formula?
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C19H23N5O5
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