SEARCH Articles Figures Tables 1- ethyl urea amino acid Acid-catalyzed condensation with urea Acid-catalyzed condensation with urea preparation Acrylic acid ureas Amide formation, from a carboxylic acid and urea Amide from an acid and urea Amide, urethane, urea, and sulfonic acid Amino acid degradation urea cycle Amino acid urea cycle defects Amino acids urea cycle Carboxylic acids and ureas Hydroxamic acid derivatives ureas Hydroxamic acids ureas J-Acid urea N-Alkyl urea hydroxamic acids Nitrous acid reaction with urea Parabanic acids ureas Purification of Fatty Acid Amides Using Urea Urea (and uric acid) from urine Urea Valeric acid Urea adduct, fatty acid Urea alkanoic acid Urea amino acids Urea, reaction with acids Urea, reaction with conjugated acids Urea-amino acid conjugates Urea-phosphoric acid Urea/carboxylic acids Ureas carboxylic acid amides