bis-(4-acetoacetylamino-phenyl)-methane, Acetoacetanilide,4',4'''-methylenebis-(8CI), N,N'-(methylenedi-4,1-phenylene)bis[3-oxobutyramide], 3-oxo-N-(4-{[4-(3-oxobutanoylamino)phenyl]methyl}phenyl)butanamide, Butanamide,N,N'-(methylenedi-4,1-phenylene)bis[3-oxo,