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Under IUPAC nomenclature, a molecule named N-[4-(9-phenylcarbazol-3-yl)phenyl]-N-[2-(4-phenylphenyl)phenyl]spiro[1-azapentacyclo[10.7.1.02,7.08,20.014,19]icosa-2(7),3,5,8(20),9,11,14,16,18-nonaene-13,9'-fluorene]-5-amine is given. What is its corresponding molecular formula?
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C73H47N3
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