You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 15,16-dimethyl-5,26-diphenyl-9,22-bis(4-phenylphenyl)-5,26-diazaheptacyclo[15.11.0.02,14.04,12.06,11.019,27.020,25]octacosa-1(17),2(14),3,6(11),7,9,12,18,20(25),21,27-undecaene by IUPAC nomenclature, provide its molecular formula.
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C64H48N2
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