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-[3-[[N-[(1-ethylcyclopentyl)methyl]-N'-methylcarbamimidoyl]amino]propyl]thiophene-2-carboxamide is given. What is its corresponding molecular formula?
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C18H30N4OS
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