diethyl 2-[2-(dimethylamino)ethyl]propanedioate

diethyl 2-ethyl-2-pentylpropanedioate

diethyl 2-(4-methyl-3-oxo-1-phenylpentyl)propanedioate

diethyl 2-acetamido-2-[(2-chlorophenyl)methyl]propanedioate

2-oxo-N-phenylchromene-3-carboxamide