You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-(ethylcarbamoylamino)-2-oxoethyl] (3S)-1-[(1S,2S,3S)-2,3-dimethylcyclohexyl]-5-oxopyrrolidine-3-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H29N3O5
assistant