You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(2,5-dioxopyrrolidin-1-yl)-2-[3-(2,5-dioxopyrrol-1-yl)propanoylamino]hexanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H20N3O7-
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