You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-cyclopentyl-1-[2-[3-(4-hydroxypiperazin-1-yl)-3-oxopropoxy]ethyl]pyrrolidine-2,5-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H29N3O5
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