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 [2-(cyclopentylamino)-2-oxoethyl] 2-chloro-5-[(2-methoxy-5-nitrophenyl)sulfamoyl]benzoate is given. What is its corresponding molecular formula?
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C21H22ClN3O8S
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