You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as (6-bromo-3,4-dihydro-2H-quinolin-1-yl)-(2-piperidin-1-ylsulfonylphenyl)methanone using the IUPAC nomenclature.
user
C21H23BrN2O3S
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