| 2,3,5,6-Tetrachloroterephthalonitrile; Tetrachloroterephthalonitrile; 1,4-Benzenedicarbonitrile,2,3,5,6-tetrachloro; p-Tetrachlorophthalodinitrile; 1,4-(CN)2-C6Cl4; Perchloroterephthalonitrile; 2,3,5,6-tetrachloroterephthalodinitrile; tetrachloroterephthalic nitrile; p-Phthalodinitrile,tetrachloro; 2,3,5,6-tetrachloro-1,4-benzenedicarbonitrile; tetrachloro-p-dicyanobenzene; 1,4-dicyano-2,3,5,6-tetrachlorobenzene; p-TCPN;
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