You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 1-(4-chlorophenyl)-3-(1,3-dithiolan-2-ylidene)-5-(pyridin-2-ylmethyl)pyrrolidine-2,4-dione into molecular formula.
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C19H15ClN2O2S2
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