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 2-ethyl-N-(4-fluoro-1,3-benzothiazol-2-yl)-5-methyl-N-(3-morpholin-4-ylpropyl)pyrazole-3-carboxamide into molecular formula.
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C21H26FN5O2S
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