title: Carbon-13 nuclear magnetic resonance assignments and spectral characteristics for some pavine alkaloids.
abstract: Detailed 13C-NMR spectral assignments were made for some pavine alkaloids isolated from Cryptocarya chinensis, including (-)-crychine (1), (-)-caryachine (2), and (+)-O-methylcaryachine (3), and neocaryachine (4). The assignments were based on detailed analysis of 1H NMR, 13C NMR, heteronuclear 1H-13C COSY, both one-bond and long-range correlations, and cross comparisons with model compounds. Substituent effects on the chemical shifts of the N-methylpavinane skeleton were analyzed in view of their utility in structural elucidation.
authors.forename: S S
authors.initials: SS
authors.lastname: Lee
authors.forename: Y C
authors.initials: YC
authors.lastname: Liu
authors.forename: C H
authors.initials: CH
authors.lastname: Chen
mesh_terms: D000470:Alkaloids / Q000032:analysis*; D002247:Carbon Isotopes; D055598:Chemical Phenomena; D002621:Chemistry; D009682:Magnetic Resonance Spectroscopy
chemical_list: D000470:Alkaloids; D002247:Carbon Isotopes