13796-22-0 5,6,12,13-Tetrahydro-2,9-dimethylquino(2,3-b)acridine-7,14-dione EINECS 237-452-5 Quinacridone, 6,13-dihydro-2,9-dimethyl- Quino(2,3-b)acridine-7,14-dione, 5,6,12,13-tetrahydro-2,9-dimethyl-