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 [1-(2,4-dichlorophenyl)pyrazol-4-yl]-(3-methylpiperazin-1-yl)methanone;hydrochloride is given. What is its corresponding molecular formula?
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C15H17Cl3N4O
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