[Imidazolidine ring closure of amino acid 4-carboethoxyphenylamides].
D000577:Amides; D000596:Amino Acids; D003460:Crystallization; D005557:Formaldehyde; D007093:Imidazoles / Q000138:chemical synthesis*
D000577:Amides; D000596:Amino Acids; D007093:Imidazoles; D005557:Formaldehyde