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-[[2-(4-chloro-3-fluorophenoxy)acetyl]amino]-1-bicyclo[1.1.1]pentanyl]-4-methylthieno[3,2-b]pyrrole-5-carboxamide is given. What is its corresponding molecular formula?
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C21H19ClFN3O3S
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