You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 4-[[(E)-2-cyano-3-(3-iodo-5-methoxy-4-prop-2-enoxyphenyl)prop-2-enoyl]amino]benzoic acid is given. What is its corresponding molecular formula?
user
C21H17IN2O5
assistant