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 4-amino-N-[2-(3,4-dimethoxyphenyl)ethyl]-3-methyl-2-propan-2-ylsulfonylbutanamide is given. What is its corresponding molecular formula?
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C18H30N2O5S
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