1,4-Benzenedicarbonitrile 1,4-Benzodinitrile 1,4-Dicyanobenzene 4-Cyanobenzonitrile 623-26-7 NSC78439 Nitril kyseliny tereftalove Tereftalodinitril Terephthalic acid dinitrile Terephthalodinitrile Terephthalonitrile WLN: NCR DCN p-Benzenedinitrile p-Dicyanobenzene p-Pdn p-Phthalodinitrile