You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(5Z)-5-[[2,5-dimethyl-1-(4-nitrophenyl)pyrrol-3-yl]methylidene]-3-propyl-2-sulfanylideneimidazolidin-4-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H20N4O3S
assistant