You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Translate the chemical IUPAC name 1-(2-chloro-5-fluorophenyl)-8-(2,3-dihydroindole-1-carbonylamino)-N-methyl-3-oxo-2,4-dihydro-1H-pyrrolo[1,2-a]pyrazine-6-carboxamide into its molecular formula.
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C24H21ClFN5O3
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