You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 4-[4-(2-fluorophenyl)piperazine-1-carbonyl]-2,9-dimethylpyrido[3,4-b]indol-1-one by IUPAC nomenclature, provide its molecular formula.
user
C24H23FN4O2
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