You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2S)-2-(2,4-dimethylphenoxy)-1-[4-(2,3-dimethylphenyl)piperazin-1-yl]propan-1-one by IUPAC nomenclature, provide its molecular formula.
user
C23H30N2O2
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