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 methyl (5E)-2-(2-chlorophenyl)imino-5-[[4-(dimethylamino)phenyl]methylidene]-4-hydroxythiophene-3-carboxylate into molecular formula.
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C21H19ClN2O3S
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