1,3-Indandione, 2-(2-naphthyl)- 2-(2-Naphthyl)-1H-indene-1,3(2H)-dione 2-beta-Naftyloindandion-1,3 [Polish] 2156-11-8 4-07-00-02649 (Beilstein Handbook Reference) BRN 1979355