You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (2R,3R)-1-[2-[3-(9H-fluoren-9-ylmethoxycarbonylamino)cyclobutyl]acetyl]-2-methylpiperidine-3-carboxylic acid .
user
C28H32N2O5
assistant