Isopropylidenemalononitrile13166-10-4100 % similar Tetracyanoquinodimethane1518-16-740 % similar 4-Dicyanomethylene-2,6-dimethyl-4H-pyran28286-88-638 % similar 2-(1-Ethoxyethylidene)propanedinitrile5417-82-338 % similar Methacrylonitrile126-98-738 % similar [(Dimethylamino)methylene]propanedinitrile16849-88-033 % similar Tetramethylethylene563-79-133 % similar 2-Amino-1-propene-1,1,3-tricarbonitrile868-54-232 % similar