You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[2-[[3-carboxy-2-[(2,5-diamino-5-oxopentanoyl)amino]propanoyl]amino]-5-(diaminomethylideneamino)pentanoyl]amino]pentanedioic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H34N8O10
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