You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-oxo-2-[[(1S)-1-thiophen-2-ylethyl]amino]ethyl] 4-fluoro-3-(methoxymethyl)-1-benzothiophene-2-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H18FNO4S2
assistant