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Under IUPAC nomenclature, a molecule named N-phenyl-N-spiro[fluorene-9,14'-tetracyclo[13.4.0.02,7.08,13]nonadeca-1(19),2,4,6,8,10,12,15,17-nonaene]-3-yl-14-oxatetracyclo[13.4.0.02,7.08,13]nonadeca-1(19),2(7),3,5,8,10,12,15,17-nonaen-4-amine is given. What is its corresponding molecular formula?
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C55H35NO
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