You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 5-(4-benzylsulfonylpiperazin-1-yl)-2-(3-chlorophenyl)-4-[(4-methylphenyl)methyl]pyridazin-3-one by IUPAC nomenclature, provide its molecular formula.
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C29H29ClN4O3S
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