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Bibenzhydryl sym-Tetraphenylethane α,α,β,β-tetraphenylethane 1,1,2,2-TETRAPHENYLETHANE ethane,1,1,2,2-tetraphenyl- Ethane, 1,1,2,2-tetraphenyl- (1,2,2-Triphenylethyl)benzene alpha,alpha,beta,beta-Tetraphenylethane benzene,1,1’,1’’,1’’’-(1,2-ethanediylidene)tetra-