You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
propan-2-yl 2-[5-[(3,4-dichlorophenyl)methylidene]-4-oxo-2-sulfanylidene-1,3-thiazolidin-3-yl]acetate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H13Cl2NO3S2
assistant