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-(5-methyl-1,3-thiazol-2-yl)-3-(oxan-4-yl)-2-(2-oxo-5-pyrrolidin-1-ylsulfonylpyridin-1-yl)propanamide into molecular formula.
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C21H28N4O5S2
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