4613-11-0 Benzene, 1,1'-(1,2-dimethyl-1,2-ethanediyl)bis-, (R*,S*)- Benzene, 1,1'-(1,2-dimethyl-1,2-ethanediyl)bis-, [R-(R*,S*)]- Bibenzyl, .alpha.,.alpha.'-dimethyl-, erythro- NSC133938 erythro-2,3-Diphenylbutane meso-2,3-Diphenylbutane