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-(1-phenylpyrazol-4-yl)-N-(6,7,8,9-tetrahydro-5H-[1,2,4]triazolo[4,3-a]azepin-3-ylmethyl)-1,3-thiazole-4-carboxamide into molecular formula.
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C21H21N7OS
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