You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (6S)-6-(2-hydroxy-2-methylpropyl)-3-[(1S)-1-[4-(2-methylpyrimidin-5-yl)phenyl]ethyl]-6-phenyl-1,3-oxazinan-2-one by IUPAC nomenclature, provide its molecular formula.
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C27H31N3O3
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