You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name methyl 5-[[4-[(E)-(2,4-dioxo-3-propan-2-yl-1,3-thiazolidin-5-ylidene)methyl]-2-methoxyphenoxy]methyl]furan-2-carboxylate into its molecular formula.
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C21H21NO7S
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