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Total assignments of 1 H and 13 C NMR spectra of biflorin and bis‐biflorin from Capraria biflora
Author(s) -
Fonseca Aluisio M.,
Pessoa Otília D. L.,
Silveira Edilberto R.,
Monte Francisco J. Q.,
BrazFilho Raimundo,
Lemos Telma L. G.
Publication year - 2003
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1295
Subject(s) - chemistry , dimer , mass spectrum , nmr spectra database , mass spectrometry , nuclear magnetic resonance spectroscopy , high resolution , stereochemistry , spectral line , organic chemistry , physics , chromatography , remote sensing , astronomy , geology
Bis‐biflorin, a new o ‐naphthoquinone dimer, and biflorin, 6,9‐dimethyl‐3‐(4‐methyl‐3‐pentenyl)naphtho[1,8‐ bc ]‐pyran‐7,8‐dione, were isolated from roots of Capraria biflora , a medicinal plant from northeast Brazil. Structural elucidation was made on the basis of spectral data, mainly by high‐field NMR and high‐resolution mass spectrometry. Copyright © 2003 John Wiley & Sons, Ltd.