You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-2-[(5E)-4-oxo-5-[(4-propoxyphenyl)methylidene]-2-sulfanylidene-1,3-thiazolidin-3-yl]propanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H16NO4S2-
assistant