You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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N-[3-[(3,4-dimethoxyphenyl)methoxy]-5-(3-methoxyphenyl)pyrazin-2-yl]-4-methylbenzenesulfonamide is the IUPAC name of a molecule. Please give its molecular formula.
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C27H27N3O6S
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