You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 3,4-dimethoxy-1,6-diazatetracyclo[7.6.1.05,16.010,15]hexadeca-3,5(16),8,10,12,14-hexaene-2,7-dione into molecular formula.
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C16H12N2O4
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