5-乙氧基甲烯基-2,2-二甲基-1,3-二氧六环-4,6-二酮

N-(3-Chlor-4-fluor-phenyl)-N-ethyl-aminomethylen-meldrumsaeure

5-[(2-bromophenyl)methylene]-2,2-dimethyl-1,3-dioxane-4,6-dione

3-butyl-9,9-dimethyl-7,11-dioxo-8,10-dioxa-1-azaspiro[5.5]undec-3-en-1-yl 4-methylbenzenesulfonate

5-(((3,4-dichlorophenyl)amino)methylene)-2,2-dimethyl-1,3-dioxane-4,6-dione