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 5-bromo-2-methoxy-N-[(1S)-6-methoxy-1,2,3,4-tetrahydronaphthalen-1-yl]benzenesulfonamide into molecular formula.
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C18H20BrNO4S
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