title: Chemistry of acronycine, XII. Further oligomers of noracronycine.
abstract: The polymerization of noracronycine (2) with methanolic HCl has yielded a second tetramer of 2, designated as AB-4 and determined to have the structure 7 through spectroscopic analysis. Two further pentamers of 2, designated as AB-6A and AB-6B, have also been obtained, and their structures are tentatively proposed as 9 and 5, respectively.
mesh_terms: D000175:Acronine / Q000031:analogs & derivatives / Q000032:analysis*; D000470:Alkaloids / Q000032:analysis*; D055598:Chemical Phenomena; D002621:Chemistry; D009682:Magnetic Resonance Spectroscopy; D013237:Stereoisomerism
chemical_list: D000470:Alkaloids; C046848:noracronycine; D000175:Acronine