You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named ethyl (2Z,5R)-2-[[5-(2,5-dichloro-4-nitrophenyl)furan-2-yl]methylidene]-5-(4-fluorophenyl)-7-methyl-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate is given. What is its corresponding molecular formula?
user
C27H18Cl2FN3O6S
assistant