You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(5Z)-5-[(2,5-dimethoxy-4-pyrrolidin-1-ylphenyl)methylidene]-2-sulfanylideneimidazolidin-4-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H19N3O3S
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