12H-Phthaloperin-12-one, 8,9,10,11-tetrachloro- 20749-68-2 59459-26-6 8,9,10,11-Tetrachloro-12-phthaloperinone 8,9,10,11-Tetrachloro-12H-phthaloperin-12-one EINECS 244-007-9