You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (4Z)-1-[2-(dimethylamino)ethyl]-4-[hydroxy-(4-methylphenyl)methylidene]-5-thiophen-2-ylpyrrolidine-2,3-dione ?
user
C20H22N2O3S
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