(delta(sup 1,2')-Biindan)-1',3,3'-trione azine 15255-40-0 3,3''-Azinobis(delta(sup 1,2')-biindan-1',3'-dione) BRN 2198368 delta(sup 1,2')-Biindan-1',3'-dione, 3,3''-azinobis-