You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4S,5S)-1-cyclohexyl-5-[1-(3,5-dimethylphenyl)-2,5-dimethylpyrrol-3-yl]-4-pyridin-2-ylimidazolidine-2-thione is the IUPAC name of a molecule. Please give its molecular formula.
user
C28H34N4S
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