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 N-[(2S)-1-acetyl-3-oxo-5-phenyl-2-propan-2-yl-2H-pyrazin-4-yl]-N-[(2S)-1-hydroxy-3-phenylpropan-2-yl]acetamide is given. What is its corresponding molecular formula?
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C26H31N3O4
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