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 N-[(3-fluorophenyl)methyl]-6,11,11-trioxo-5H-benzo[b][1,4]benzothiazepine-3-carboxamide using the IUPAC nomenclature.
user
C21H15FN2O4S
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