You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[4-[(E)-[2-(2-hydroxyethylimino)-4-oxo-1,3-thiazolidin-5-ylidene]methyl]-2-methoxyphenoxy]-3-(trifluoromethyl)benzonitrile is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H16F3N3O4S
assistant