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 (2S)-2-cyclopentyl-2-[4-[(2,4-dimethylpyrido[2,3-b]indol-9-yl)methyl]phenyl]acetyl chloride .
user
C27H27ClN2O
assistant