You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(Z)-N-[3-[2-[2-[3-[2-(3-aminopropanoylamino)ethylamino]-3-oxopropoxy]ethoxy]ethylamino]-3-oxopropyl]-N-methyl-4-oxobut-2-enamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H35N5O7
assistant