You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (2,3-dichlorophenyl)-[4-[(2R)-2-hydroxy-3-pyrazol-1-ylpropyl]piperazin-1-yl]methanone by IUPAC nomenclature, provide its molecular formula.
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C17H20Cl2N4O2
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