You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[2-[(E)-[3-[(2-cyanophenyl)methyl]-2,4-dioxo-1,3-thiazolidin-5-ylidene]methyl]phenoxy]-N-(4-methylphenyl)acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H21N3O4S
assistant