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What is the molecular formula of the compound with this IUPAC name dimethyl 12-(4-methylphenyl)sulfonyl-2-oxo-12-azatetracyclo[9.7.0.03,8.013,18]octadeca-1(11),3,5,7,13,15,17-heptaene-9,9-dicarboxylate ?
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C28H23NO7S
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