You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 2,3,5-tris(4-phenoxazin-10-ylphenyl)-6-[4-(9H-xanthen-9-yl)phenyl]benzene-1,4-dicarbonitrile into molecular formula.
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C81H49N5O4
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