You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-[2-(3-chloro-4-fluoro-N-[(1R)-2-oxo-2-[[(2R)-oxolan-2-yl]methylamino]-1-phenylethyl]anilino)-2-oxoethyl]thiophene-2-carboxamide into molecular formula.
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C26H25ClFN3O4S
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