You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule prop-2-enyl 5-(4-chlorophenyl)-2-[3-(2-methoxyphenyl)prop-2-enylidene]-7-methyl-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate into molecular formula.
user
C27H23ClN2O4S
assistant