You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named N'-[(Z)-(4-hydroxy-3-iodo-5-methoxyphenyl)methylideneamino]-N-[(4-methylphenyl)methyl]oxamide is given. What is its corresponding molecular formula?
user
C18H18IN3O4
assistant