You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(benzylcarbamoyl)-3-(4-methyl-2,5-dioxo-4-thiophen-3-ylimidazolidin-1-yl)propanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H20N4O4S
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