You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule N-[(5Z)-5-[(3-ethoxy-5-iodo-4-phenylmethoxyphenyl)methylidene]-4-oxo-1,3-thiazol-2-yl]acetamide ?
user
C21H19IN2O4S
assistant