2,3,5,6-Tetrafluoro-7,7,8,8-tetracyanoquinodimethane29261-33-4100 % similar Tetracyanoethylene670-54-247 % similar Isopropylidenemalononitrile13166-10-436 % similar Tetracyanoquinodimethane1518-16-736 % similar 2-(Dicyanomethylene)-1,3-indandione16954-74-834 % similar 2-[Di(methylthio)methylidene]malononitrile5147-80-832 % similar 2-(1,3-Dioxolan-2-ylidene)propanedinitrile5694-65-532 % similar