You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-(5-bromothiophen-2-yl)-4-methyl-2,5-dioxoimidazolidin-1-yl]-N-(4-propylphenyl)acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H20BrN3O3S
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