You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (4S,5S)-1-(4-bromophenyl)-5-[1-[[(2S)-oxolan-2-yl]methyl]pyrrol-2-yl]-4-pyridin-2-ylimidazolidine-2-thione by IUPAC nomenclature, provide its molecular formula.
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C23H23BrN4OS
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