You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 5-N-(2-fluoro-4,6-diphenylphenyl)-5-N,18-N-diphenyl-18-N-(4-trimethylsilylphenyl)-21-oxapentacyclo[12.7.0.02,7.08,13.015,20]henicosa-1(14),2(7),3,5,8,10,12,15(20),16,18-decaene-5,18-diamine by IUPAC nomenclature, provide its molecular formula.
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C59H45FN2OSi
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