You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 2-cyano-3-[3-ethyl-4-oxo-5-[2-[(1-oxo-2H-isoquinolin-5-yl)amino]ethyl]-1,3-thiazolidin-2-yl]propanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H26N4O4S
assistant