(3-cyano-propyl)-phthalimido-malonic acid diethyl ester

2-(2,4-dinitro-phenylhydrazono)-adipic acid

2-Piperidinecarboxamide, 6-oxo-

1,1,4-Tris-aethoxycarbonyl-1-acetamido-butan

2-哌啶甲酸