1,1'-Thiobis(.beta.-naphthol) 1,1'-Thiobis(2-naphthol) 1,1'-Thiodi-.beta.-naphthol 1,1-Thiobis(.beta.-naphthol) 17096-15-0 2-Naphthalenol, 1,1'-thiobis- 2-Naphthol, 1,1'-thiodi- Bis(2-hydroxy-1-naphthyl) sulfide NSC11877