You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl (2E)-5-(2-chlorophenyl)-2-[(4-methoxynaphthalen-1-yl)methylidene]-7-methyl-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C28H23ClN2O4S
assistant