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 5,17-di(dibenzofuran-1-yl)-11-(2-phenylphenyl)-8,14-dioxa-1-azapentacyclo[11.7.1.02,7.09,21.015,20]henicosa-2(7),3,5,9,11,13(21),15(20),16,18-nonaene is given. What is its corresponding molecular formula?
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C54H31NO4
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