You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
8-(2-methylpropyl)-3-[1-(2-phenylacetyl)piperidin-4-yl]-1,3,8-triazaspiro[4.5]decane-2,4-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C24H34N4O3
assistant