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What is the molecular formula of the molecule 2,3-bis(11,11-dimethylbenzo[b]fluoren-2-yl)quinoxaline;2-(11,11-dimethylbenzo[b]fluoren-2-yl)-3-(4-phenylphenyl)quinoxaline;2-(9,9-dimethylfluoren-2-yl)-3-(4-phenylphenyl)quinoxaline ?
user
C120H88N6
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