You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-2-amino-N-[(3S)-2-oxo-5-phenyl-1-phenylmethoxypentan-3-yl]-4-phenylbutanamide;hydrochloride The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H33ClN2O3
assistant