You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 2-[[4-chloro-2-fluoro-5-(1-methoxy-1-oxopropan-2-yl)sulfanylphenyl]carbamothioyl]diazinane-1-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H23ClFN3O4S2
assistant