You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by propyl 3-[4-oxo-2-sulfanylidene-5-[(3,4,5-trimethoxyphenyl)methylidene]-1,3-thiazolidin-3-yl]propanoate ?
user
C19H23NO6S2
assistant