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 4-ethoxy-1-[(2S)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-3-methylbutanoyl]pyrrolidine-3-carboxylic acid .
user
C27H32N2O6
assistant