You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
azane;(5R)-3-[1-(2-methylpropyl)-2-oxo-3H-indol-5-yl]-2-oxo-1,3-oxazolidine-5-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H22N4O4
assistant