You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(1R)-1-phenylbutyl] (2S)-1-[(2S)-1-[2-[[3,3-dimethyl-2-[(1-methylpiperidine-2-carbonyl)amino]butanoyl]-methylamino]-3-methylbutyl]pyrrolidine-2-carbonyl]pyrrolidine-2-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C39H63N5O5
assistant