You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl (2E,5R)-5-(4-fluorophenyl)-7-methyl-2-[[2-[(4-methyl-6-oxo-1H-pyrimidin-2-yl)sulfanyl]-5-nitrophenyl]methylidene]-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H22FN5O6S2
assistant