title: Cyclols-formation from tripeptide systems and structure assignment by carbon-13 nuclear magnetic resonance.
mesh_terms: D000478:Alkylation; D000595:Amino Acid Sequence; D002247:Carbon Isotopes; D055598:Chemical Phenomena; D002621:Chemistry; D003500:Cyclization; D004952:Esters; D009682:Magnetic Resonance Spectroscopy; D008722:Methods; D010456:Peptides, Cyclic / Q000138:chemical synthesis*; D010879:Piperazines; D011392:Proline
chemical_list: D002247:Carbon Isotopes; D004952:Esters; D010456:Peptides, Cyclic; D010879:Piperazines; D011392:Proline