You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 6-[(3R)-3-[6-[(4-chlorophenyl)methyl]pyridin-2-yl]piperidine-1-carbonyl]-2-methylpyridazin-3-one into its molecular formula.
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C23H23ClN4O2
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