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 2-[(2-aminocyclohexyl)amino]-4-(1-benzothiophen-3-yl)-6,7-dihydropyrrolo[3,4-d]pyrimidin-5-one is given. What is its corresponding molecular formula?
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C20H21N5OS
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