Synonyms: 2,4-Cyclopentadien-1-one,2,3,4,5-tetrachloro-, dimethyl acetal (8CI);Cyclopentadiene, 1,2,3,4-tetrachloro-5,5-dimethoxy-(5CI);Cyclopentadienone, tetrachloro-, dimethyl acetal (6CI,7CI);1,1-Dimethoxy-2,3,4,5-tetrachloro-2,4-cyclopentadiene;1,1-Dimethoxy-2,3,4,5-tetrachlorocyclopentadiene;1,1-Dimethoxytetrachlorocyclopentadiene;1,2,3,4-Tetrachloro-5,5-dimethoxy-1,3-cyclopentadiene;1,2,3,4-Tetrachloro-5,5-dimethoxycyclopentadiene;2,3,4,5-Tetrachloro-1,1-dimethoxycyclopentadiene;2,3,4,5-Tetrachloro-2,4-cyclopentadien-1-one dimethyl acetal;2,3,4,5-Tetrachlorocyclopentadienone dimethyl acetal;5,5-Dimethoxy-1,2,3,4-tetrachloro-1,3-cyclopentadiene;5,5-Dimethoxy-1,2,3,4-tetrachlorocyclopentadiene;5,5-Dimethoxytetrachlorocyclopentadiene;NSC 5584;Tetrachlorocyclopentadienonedimethyl acetal;Tetrachlorocyclopentadienone dimethyl ketal;