You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[[2-[(2-amino-3-phenylpropanoyl)amino]-4-methylpentanoyl]amino]-5-(1-carboxyethylamino)-5-oxopentanoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H34N4O7
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