You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[(2Z,5Z)-2-[3-(carboxymethyl)-4-oxo-2-sulfanylidene-1,3-thiazolidin-5-ylidene]-5-[(1Z)-3-methyl-1-(3-methyl-1,3-benzothiazol-2-ylidene)butan-2-ylidene]-4-oxo-1,3-thiazolidin-3-yl]acetic acid by IUPAC nomenclature, provide its molecular formula.
user
C23H21N3O6S4
assistant