You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (11R)-5-[(4-chlorophenyl)methyl]-3-[(2R)-2-methylpiperidine-1-carbonyl]-11-oxobenzo[b][1,4]benzothiazepin-6-one into its molecular formula.
user
C27H25ClN2O3S
assistant