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 (5Z)-2-(5-chloro-2-methylanilino)-5-[[5-(2-chloro-5-nitrophenyl)furan-2-yl]methylidene]-1,3-thiazolidin-4-one .
user
C21H15Cl2N3O4S
assistant