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system
Name the molecular formula for the molecule established as 10-(3,4,5,6-tetramethyl-14'-phenoxazin-10-ylspiro[fluorene-9,2'-tricyclo[9.4.0.03,8]pentadeca-1(11),3(8),4,6,9,12,14-heptaene]-5'-yl)phenoxazine using the IUPAC nomenclature.
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C55H40N2O2
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