.alpha.-Naphtholbenzein 1(4H)-Naphthalenone, 4-[(4-hydroxy-1-naphthalenyl)phenylmethylene]- 1(4H)-Naphthalenone, 4-[.alpha.-(4-hydroxy-1-naphthyl)benzylidene]- 145-50-6 NSC9862 p-Naphtholbenzein