You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 5-amino-2-[[6-amino-2-[[5-amino-2-[(2-amino-3-hydroxybutanoyl)amino]-5-oxopentanoyl]amino]hexanoyl]amino]-5-oxopentanoic acid into molecular formula.
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C20H37N7O8
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