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-[[3-(11-oxo-1-azatricyclo[6.3.1.04,12]dodeca-4(12),5,7-trien-7-yl)phenyl]methylidene]-1,3-thiazolidine-2,4-dione .
user
C21H16N2O3S
assistant