You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 1-benzyl-8-[2-(4-phenylpiperidin-1-yl)acetyl]-1,8-diazaspiro[4.5]decan-2-one using the IUPAC nomenclature.
user
C28H35N3O2
assistant