You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4S,5R)-5-[2,5-dimethyl-1-(2-methylphenyl)pyrrol-3-yl]-1-(4-methoxyphenyl)-4-pyridin-2-ylimidazolidine-2-thione is the IUPAC name of a molecule. Please give its molecular formula.
user
C28H28N4OS
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