You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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ethyl 11-ethyl-1,8,10-triazatricyclo[7.3.0.03,7]dodeca-2,7,9,11-tetraene-12-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
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C14H17N3O2
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