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 4-(4-ethylphenyl)-N-[2-[(6-hydroxy-1,3-benzothiazol-2-yl)amino]-2-oxoethyl]benzamide is given. What is its corresponding molecular formula?
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C24H21N3O3S
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