You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named (4S,5S)-4-butan-2-yl-5-[(E)-2-methylidene-4-phenylbut-3-enyl]-1,3-oxazolidin-2-one is given. What is its corresponding molecular formula?
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C18H23NO2
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