You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2-[4-[(2-acetamido-4-oxo-1,3-thiazol-5-ylidene)methyl]phenoxy]-N-(3-methylphenyl)acetamide .
user
C21H19N3O4S
assistant