You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named N'-[2-(5-chlorothiophen-2-yl)-2-hydroxyethyl]-N-ethyl-4-(2-oxo-2-pyrrolidin-1-ylethyl)piperazine-1-carboximidamide is given. What is its corresponding molecular formula?
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C19H30ClN5O2S
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