Multiple choice During the artificial peptide synthesis, the amino acids are coupled by N,N-Dicyclohexylcarbodiimide Iron(III) chloride Orthoformic acid Phosphorus pentoxide Reveal answer Fill a bubble to check yourself A Correct answer Explanation N,N-Dicyclohexylcarbodiimide is an organic whose primary use is to couple amino acids during artificial peptide synthesis. Under standard conditions, it exists in the form of white crystals with a heavy, sweet odour.