You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (5Z)-3-[(4-chlorophenyl)methyl]-5-[[1-(2-methylpropyl)indol-3-yl]methylidene]-1,3-thiazolidine-2,4-dione into its molecular formula.
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C23H21ClN2O2S
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