title: Cyclic peptides. 8. 13C and 1H nuclear magnetic resonance evidence for slow cis'-trans' rotation in a cyclic tetrapeptide.
mesh_terms: D002247:Carbon Isotopes; D055598:Chemical Phenomena; D002621:Chemistry; D006859:Hydrogen; D007536:Isomerism; D009682:Magnetic Resonance Spectroscopy; D010456:Peptides, Cyclic
chemical_list: D002247:Carbon Isotopes; D010456:Peptides, Cyclic; D006859:Hydrogen