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-(4-methylsulfonylpiperazin-1-yl)-2-[1-(pyrrol-1-ylmethyl)cyclohexyl]ethanone is given. What is its corresponding molecular formula?
user
C18H29N3O3S
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