You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 1-[4-amino-2-[[2-[(2-amino-3-hydroxybutanoyl)amino]-3-phenylpropanoyl]amino]-4-oxobutanoyl]pyrrolidine-2-carboxylic acid by IUPAC nomenclature, provide its molecular formula.
user
C22H31N5O7
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