You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N'-[2-[2-(4-fluorophenyl)ethylamino]acetyl]-4-methyl-N'-[3-(2-oxopyrrolidin-1-yl)propyl]pentanehydrazide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H35FN4O3
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