You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule (5Z)-5-[[1-[(4-chlorophenyl)methyl]-7-ethylindol-3-yl]methylidene]-3-methyl-2-sulfanylidene-1,3-thiazolidin-4-one ?
user
C22H19ClN2OS2
assistant