2,9-Dichloro-5,6,12,13-tetrahydroquino(2,3-b)acridine-7,14-dione 51085-07-5 EINECS 256-959-2 Quino(2,3-b)acridine-7,14-dione, 2,9-dichloro-5,6,12,13-tetrahydro-