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 (5Z)-5-[[1-[[4-fluoro-2-(trifluoromethyl)phenyl]methyl]indol-5-yl]methylidene]-1,3-thiazolidine-2,4-dione .
user
C20H12F4N2O2S
assistant