You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule benzyl N-[(2S)-1-[(1,3-diamino-3-oxoprop-1-en-2-yl)amino]-1-oxo-3-phenylpropan-2-yl]carbamate into molecular formula.
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C20H22N4O4
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