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 [3-[[3-(4-fluorophenyl)imidazo[1,5-a]pyridine-1-carbonyl]amino]-2,2-dimethylpropyl] 2,2,2-trifluoroacetate is given. What is its corresponding molecular formula?
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C21H19F4N3O3
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