You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N'-methyl-N-[(5-methylthiophen-2-yl)methyl]-4-(1-oxo-1-pyrrolidin-1-ylpropan-2-yl)piperazine-1-carboximidamide into its molecular formula.
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C19H31N5OS
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