You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[(4S)-2,5-dioxoimidazolidin-4-yl]-N-ethyl-N-[(3-ethyl-1,2,4-oxadiazol-5-yl)methyl]propanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C13H19N5O4
assistant