You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 3-[2-[butan-2-yl(methyl)amino]ethyl]-2,5-di(propan-2-yl)imidazolidin-4-one by IUPAC nomenclature, provide its molecular formula.
user
C16H33N3O
assistant