3,3,N,N-Tetramethyl-2-[1-phenyl-meth-(Z)-ylidene]-butyramide

5-hydroxy-3,5-di-tert-butyl-2-furanone

4-Bromo-2-tert-butyl-5,5-dimethyl-hexa-2,3-dienoic acid dimethylamide

3-Dimethylamino-2,4-di-tert.-butyl-cyclobut-2-en-on