You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 14-phenyl-5,6,7,12-tetrazatetracyclo[6.6.2.04,16.011,15]hexadeca-1(15),2,4,8(16),9,11-hexaen-13-one is given. What is its corresponding molecular formula?
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C18H12N4O
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