Synonyms: (2,4,5,7-Tetranitro-9H-fluoren-9-ylidene)malononitrile;(2,4,5,7-Tetranitro-9H-fluorene-9-ylidene)propanedinitrile;2-(2,4,5,7-Tetranitro-9H-fluoren-9-ylidene)propanedinitrile;2-(2,4,5,7-Tetranitro-9H-fluorene-9-ylidene)malononitrile;2,4,5,7-Tetranitro-9H-fluorene-9-ylidenemalononitrile