You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 2-[[4-(dimethylamino)phenyl]methyl-methylamino]-N-[(1R)-1-(4-sulfamoylphenyl)ethyl]acetamide is given. What is its corresponding molecular formula?
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C20H28N4O3S
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