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Under IUPAC nomenclature, a molecule named methyl 7-chloro-14-[(2-formylcyclobutyl)methyl]-2-oxa-14-azatricyclo[13.4.0.04,9]nonadeca-1(15),4(9),5,7,16,18-hexaene-17-carboxylate is given. What is its corresponding molecular formula?
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C25H28ClNO4
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