You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-(3-chlorophenyl)-4-[2-[3-(4-ethylpiperazin-1-yl)propylamino]-2-oxoethyl]piperidine-1-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C23H36ClN5O2
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