You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named N-(cyclopropylmethyl)-4-thiophen-3-yl-2,3,3a,4,5,9b-hexahydro-1H-pyrrolo[3,2-c]quinoline-8-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C20H23N3OS
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