2,2-Dimethyl-4-oxo-3-[1-phenyl-meth-(E)-ylidene]-chroman-6-carbonitrile
3,4-dihydro-2,2-dimethyl-3-methylene-4-oxo-2H-1-benzopyran-6-carbonitrile
3-Benzyloxymethyl-2,2-dimethyl-4-oxo-chroman-6-carbonitrile
3',4'-dihydro-2,2,5',5'-tetramethyl-4-oxospiro<2H-1-benzopyran-3(4H),2'-<2H,5H>pyrano<3,2-c><1>benzopyran>-6,9'-dicarbonitrile
2,2-Dimethyl-4-oxo-3-piperidin-1-ylmethyl-chroman-6-carbonitrile