You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-[4-[(2,5-dimethoxyphenyl)methyl]piperazin-1-yl]-2-(3-methylphenoxy)propan-1-one by IUPAC nomenclature, provide its molecular formula.
user
C23H30N2O4
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