You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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(5Z)-5-[[2-chloro-6-[(3S)-3-(dimethylamino)pyrrolidin-1-yl]phenyl]methylidene]-1,3-thiazolidine-2,4-dione is the IUPAC name of a molecule. Please give its molecular formula.
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C16H18ClN3O2S
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