You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6,6-dimethyl-3-[1-(3-oxo-4-propan-2-ylpiperazin-2-yl)propan-2-yl]-1,3-oxazinan-2-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H29N3O3
assistant