You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-[(5Z)-5-[(2-hydroxy-5-methoxyphenyl)methylidene]-4-oxo-2-sulfanylidene-1,3-thiazolidin-3-yl]hexanoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H18NO5S2-
assistant