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 3,4-dimethoxy-N-[(2R)-2-(4-methylpiperazin-1-yl)-2-thiophen-3-ylethyl]benzenesulfonamide is given. What is its corresponding molecular formula?
user
C19H27N3O4S2
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