.beta.,.beta.'-Dinaphthylethylene .beta.,.beta.-Dinaphthylethylene 1,2-Bis(2-naphthyl)ethylene 1,2-Di-.beta.-naphthylethylene 1,2-Dinaphth-2-ylethylene 2042-99-1 Ethylene, 1,2-bis(2-naphthyl)- Ethylene, 1,2-di-.beta.-naphthyl- Ethylene, 1,2-di-2-naphthyl- NSC33572 Naphthalene, 2,2'-(1,2-ethenediyl)bis-