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system
Please write the molecular formula of the molecule 2-dibenzofuran-3-yl-3-[9,9,10,10-tetramethyl-6-(3-phenylphenyl)phenanthren-2-yl]quinoxaline;2,4-diphenyl-6-[3-(9,9,10,10-tetraphenylphenanthren-3-yl)naphthalen-1-yl]-1,3,5-triazine;2-(4-phenylphenyl)-3-(9,9,10,10-tetraphenylphenanthren-3-yl)quinoxaline .
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C171H121N7O
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