You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(3R)-6-bromo-3,4-dihydro-2H-chromen-3-yl]-3,4-dimethoxybenzenesulfonamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H18BrNO5S
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