You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 3-[(4S,5R)-5-[1-(4-fluorophenyl)pyrrol-2-yl]-4-pyridin-2-yl-2-sulfanylideneimidazolidin-1-yl]-N-(2-methoxyphenyl)propanamide by IUPAC nomenclature, provide its molecular formula.
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C28H26FN5O2S
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