You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 11,13-dimethyl-4-(2-oxopropyl)-8-selena-3,5,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2(7),3,10,12-pentaen-6-one by IUPAC nomenclature, provide its molecular formula.
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C14H13N3O2Se
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