You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (5E)-5-[(3-chloro-4,5-dimethoxyphenyl)methylidene]-3-(4-nitrophenyl)-2-sulfanylidene-1,3-thiazolidin-4-one .
user
C18H13ClN2O5S2
assistant