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 N-[(1S,2S)-1-[(2S)-4-benzyl-3-oxopiperazin-2-yl]-1-hydroxy-3-(3-phenylphenyl)propan-2-yl]acetamide .
user
C28H31N3O3
assistant