You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (11S)-5-[(2,5-dimethylphenyl)methyl]-11-oxo-3-(piperidine-1-carbonyl)benzo[b][1,4]benzothiazepin-6-one .
user
C28H28N2O3S
assistant