You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N'-[(Z)-[2-[2-(3,4-dichloroanilino)-2-oxoethoxy]phenyl]methylideneamino]-N-(3-methoxypropyl)oxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H22Cl2N4O5
assistant