You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named N-(cyclopropylmethyl)-2-[1-(1,5-dimethyl-3-oxo-2-phenylpyrazol-4-yl)tetrazol-5-yl]sulfanylacetamide is given. What is its corresponding molecular formula?
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C18H21N7O2S
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