You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 1-[5-bromo-7-[4-(2,5-dimethylphenyl)piperazin-1-yl]sulfonyl-2,3-dihydroindol-1-yl]propan-1-one .
user
C23H28BrN3O3S
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