You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 1'-[(3,4-difluorophenyl)methyl]-5'-methoxy-2'-oxo-N-(4-propan-2-ylphenyl)spiro[1,3-thiazolidine-2,3'-indole]-3-carboxamide into molecular formula.
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C28H27F2N3O3S
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