You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named methyl 4-[(3E)-3-[(4-chlorophenyl)-hydroxymethylidene]-1-(4,6-dimethyl-1,3-benzothiazol-2-yl)-4,5-dioxopyrrolidin-2-yl]benzoate by IUPAC nomenclature, provide its molecular formula.
user
C28H21ClN2O5S
assistant