Synonyms: Propanedinitrile, 2-[2-[2-[4-(dimethylamino)phenyl]ethenyl]-6-methyl-4H-pyran-4-ylidene]-, 4H-Pyran-Δ4,α-malononitrile, 2-(p-dimethylaminostyryl)-6-methyl- (6CI); Propanedinitrile, [2-[2-[4-(dimethylamino)phenyl]ethenyl]-6-methyl-4H-pyran-4-ylidene]- (9CI); 2-[2-[2-[4-(Dimethylamino)phenyl]ethenyl]-6-methyl-4H-pyran-4-ylidene]propanedinitrile; 4-(Dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran; 4-(Dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran; 4-Dicyanomethylene-6-(p-dimethylaminostyryl)-2-methyl-4H-pyran; DCM; DCM (dye); DCM 1; DCM 650; DCM-LC 6500; NK 3