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system
Name the molecular formula for the molecule established as 11-N,23-N-di(dibenzofuran-2-yl)-11-N,23-N-bis(4-propan-2-ylphenyl)-14,18-dioxaheptacyclo[15.11.0.03,15.04,13.05,10.019,28.021,26]octacosa-1,3(15),4(13),5,7,9,11,16,19(28),20,22,24,26-tridecaene-11,23-diamine using the IUPAC nomenclature.
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C68H48N2O4
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