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 4-[(3-bromophenyl)methylsulfanyl]-2-(3-fluorophenyl)-6H-pyrazolo[1,5-a][1,3,5]triazin-7-one into its molecular formula.
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C18H12BrFN4OS
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