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 5-(3-ethylsulfonylphenyl)-3-methyl-9-(3-pyrrol-1-ylpropoxy)pyrido[2,3-b]indole is given. What is its corresponding molecular formula?
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C27H27N3O3S
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