You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (4S,5R)-1-(4-bromophenyl)-5-[2,5-dimethyl-1-(4-methylphenyl)pyrrol-3-yl]-4-pyridin-2-ylimidazolidine-2-thione .
user
C27H25BrN4S
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