You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 5-[[[5-[(3-chloro-4-fluorophenyl)methylcarbamoyl]pyrazolo[1,5-a]pyrimidine-7-carbonyl]amino]methyl]thiophene-2-carboxylic acid into molecular formula.
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C21H15ClFN5O4S
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