1,1'-(1,2-Diethyl-1,2-dimethylethylene)bisbenzene 10192-93-5 3,4-Dimethyl-3,4-diphenylhexane Benzene, 1,1'-(1,2-diethyl-1,2-dimethyl-1,2-ethanediyl)bis- EINECS 233-474-4