You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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(2S)-N-[(1S)-3-amino-3-oxo-1-(5-pyrazin-2-yl-1,3,4-oxadiazol-2-yl)propyl]-5-oxopyrrolidine-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
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C14H15N7O4
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