You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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What is the molecular formula of the molecule identified by methyl 4-[[(5E)-5-[(2,3-dichlorophenyl)methylidene]-3-ethyl-4-oxo-1,3-thiazolidin-2-ylidene]amino]benzoate ?
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C20H16Cl2N2O3S
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