You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (5E)-5-[(4-phenylphenyl)methylidene]-1-prop-2-enyl-2-sulfanylidene-1,3-diazinane-4,6-dione .
user
C20H16N2O2S
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