You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(2E)-2-[3-(carboxymethyl)-4-oxo-2-sulfanylidene-1,3-thiazolidin-5-ylidene]-5-[2-(6-chloro-5-cyano-1-ethyl-3-methylbenzimidazol-2-ylidene)ethylidene]-4-oxo-1,3-thiazolidin-3-yl]acetic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H18ClN5O6S3
assistant