N,N'-二(苯基)丙二酰胺

diethyl 2-(2-methyloct-3-yn-2-yl)malonate

diethyl 2-(2-methyl-1-phenylpropan-2-yl)propanedioate

diethyl 2-tert-butyl-2-methylpropanedioate

ethyl 3,3-dimethyl-2-(oxomethylidene)butanoate