You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[4-[2-(2,3-dimethylanilino)-2-oxoethyl]piperazin-1-yl]-N-(4-ethylphenyl)acetamide by IUPAC nomenclature, provide its molecular formula.
user
C24H32N4O2
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