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 4,5-dimethoxy-2-[[2-oxo-2-[(2S)-2-thiophen-2-ylpyrrolidin-1-yl]ethyl]amino]benzoate into molecular formula.
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C20H24N2O5S
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