[(Dimethylamino)methylene]propanedinitrile16849-88-0100 % similar Tetracyanoethylene670-54-235 % similar 2-(Ethoxymethylene)propanedinitrile123-06-834 % similar Isopropylidenemalononitrile13166-10-433 % similar Tetracyanoquinodimethane1518-16-733 % similar 2-(2,4-Difluorobenzoyl)-3-(dimethylamino)acrylonitrile138716-60-632 % similar Benzylidenemalononitrile2700-22-331 % similar