.beta.,.beta.'-Dinaphthylamine .beta.,.beta.-Dinaphthylamine 2,2'-Dinaphthylamine 2,2-Dinaphthylamine 2-Naphthalenamine, N-2-naphthalenyl- 532-18-3 Di-2-Naphthylamine NSC26664 di-.beta.-Naphthylamine