You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 4-[(3R)-3-[3-(1-aminoethenylamino)propyl]-2-(methylcarbamoyl)-4-oxoazetidine-1-carbonyl]piperazine-1-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H30N6O5
assistant