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Under IUPAC nomenclature, a molecule named (7-methylspiro[1H-2-benzofuran-3,1'-cyclobutane]-4-yl) N'-[(E)-2-[(4R)-4-ethyl-4-methyl-2,5-dioxoimidazolidin-1-yl]prop-1-enyl]-N-methylidenecarbamimidate is given. What is its corresponding molecular formula?
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C23H28N4O4
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