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Spectral assignments of new diterpenes from Hyptis martiusii Benth
Author(s) -
da Cruz Araújo Edigênia Cavalcante,
Sousa Lima Mary Anne,
Rocha Silveira Edilberto
Publication year - 2004
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.1489
Subject(s) - abietane , diterpene , chemistry , two dimensional nuclear magnetic resonance spectroscopy , stereochemistry , spectral analysis , proton nmr , spectroscopy , physics , quantum mechanics
The structural characterization of two new abietanes and a new spiro‐fused tricyclic diterpene isolated from the roots of Hyptis martiusii is described. The first member of a new class of rearranged abietane diterpenoids designated martiusane was characterized by the use of 1D NMR and several 2D shift correlated NMR pulse sequences ( 1 H,1H‐COSY, HMQC, HMBC and NOESY). Unambiguous 1 H and 13 C chemical shift assignments for all compounds are reported. Copyright © 2004 John Wiley & Sons, Ltd.