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 (5S)-3-[[ethyl-[(4-oxo-3H-quinazolin-2-yl)methyl]amino]methyl]-5-methyl-5-phenylimidazolidine-2,4-dione is given. What is its corresponding molecular formula?
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C22H23N5O3
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